With regard to the one-sample chi-square test, the categories must be. Which of the following answers are correct? b. the experimental statistic Statisticians have found that it takes a sample size of about _____ to fulfill the assumption of parametric statistics that the sample is large enough to represent the population. d. -.86, Which of the following is the strongest correlation? Which of the following is another use of correlation coefficients. Example: In the late 1940s, a nationwide study conducted over several years found a high correlation between the incidence rate of new cases of polio among children in a community, and per capita ice cream consumption in the community. c. Line graph d. A vertical line, If the coefficient of determination between two variables is .81, what is the Pearson correlation coefficient? b. b. H1: rxy > 0 \end{array} For this example, the mean of the variances is \(2.649\). 31. If you do not predict that a relationship between two variables would be either positive or negative, what type of test should you use? 18. Negative c. n - 3 The dependent variable for the study was the number of free throws made out of ten shots. If a simple Pearson correlation value = .75, what percentage of variance is unaccounted for? Linear regression uses correlations as its basis. c. Strong correlation a. Continuous correlation \hline y & 10 & 20 & 30 & 40 \\ .36 Positive correlation Complete the following statement by filling in the blanks with the correct . Select one: A line sloping upwards D. A z-score of -3 and +3 are the exact same distance from the population mean. In the formula that computes a t value, what does X _1 represent? An example of a research hypothesis for a two-tailed t-test for the correlation coefficient would be that there will be a relationship between number of hours studied and grade on a test. b. Some of the important points covered in this chapter are concept of charge, concept of current, concept of potential and potential difference, concept of resistance, ohm's law. The strength of any relationship naturally depends on the specific pair of variables. Is there a difference betweenmain effect forthe levels of the first factor? Question: 1) Is ryx = rxy? a. Standard error of the estimate In a one-sample chi-square test, if your respondents are distributed very unequally across the levels of your variable, your chi-square value will be _______. Which of the following is NOT a type of reliability? c. 56 Select one: b. Weak correlation 19. The researcher selected an alpha level of .01. The first example is creating a fully-formed C++ std::string object. What does the statement rxy 0 represent? 25% 24.6% Is written in present tense. d. Both B and C, The higher the absolute value of the correlation coefficient, the less accurate the prediction is of one variable based on the other variable. Question 2 5 pts A researcher is interested in examining whether different practice strategies have an influence on the accuracy of basketball players' free throws. The number of degrees of freedom is 36% 20. a. One-tailed Select one: d. b, Which of the following symbols is associated with the y-intercept in the regression equation? In the formula that computes a t value, what does n1 represent? c. .79 (T/F), If two variables are significantly correlated, this means that one variable causes the other. Question 13 1 pts Sherry is examining the relationship between variables. Positive Select one: c. .19 The null hypothesis in an independent-samples t-test would be represented as follows: In the t-test for independent samples, the actual statistical test is _______. 2.97 19. A chi-square is calculated by dividing the total number of _______ by the number of _______. If there is significant difference between the distributions of scores in two groups with effect size at .37, how big are the differences between the two groups? (T/F), Correlations can be used to examine the differences between groups (T/F). Q6. .39 d. p = .50, If the alpha level = 0.05, which of the following indicates a NON-significant correlation? If you predict that a relationship between two variables would be either positive or negative, what type of test should you use? If so, what specific services? In a C-style string, '\0' denotes the null terminator; it's used to mark the end of the string. b. research hypothesis. Select one: Write an example of a research hypothesis for a two-tailed t-test for the correlation coefficient. d. -.92, Which of the following is the weakest correlation? 16. 0 answers. d. Slope, Using the regression formula with a slope = .704 and intercept = .719, what would the predicted college GPA be for a student whose current high school GPA = 3.2? In the formula for calculating degrees of freedom for a correlation coefficient, what does the n represent? a. 25% The researcher would run a Pearson correlation to determine the concurrent validity of her new personality measurement tool with the famous and established one. $$ c. Linear regression RXY stands for "Stability Coefficient of X and Y". b. One-tailed test H1: rxy > 0 or H1: rxy < 0 a. b. d. 26, When computing a correlation coefficient, if you have the degrees of freedom of 55, your sample size must be: 0 represents the natural birth path of energy. Which of the following would be the most appropriate test statistic to use? a) sx = 4, sy = 9 b) rxy = 0 c) sx= 2, sy = 3 d) rxy =1/2 e) rxy =1/4. Select one: Given the summary stats, how can you use the formulas to make an equation (a model)?Also. Will Mary need to use the services of a freight forwarder? Statistics and Probability questions and answers, Question 1 1 pts A researcher is looking at the correlation between depression and anxiety using a two-tailed test with an alpha level of .05. Which of the following is an example of a null hypothesis for testing a correlation coefficient? If you want to examine the difference among the average scores of three unrelated groups, which of the following statistical techniques should you select? E(X(t)) = 0 and RX(t1,t2) = 1 2 cos(t2 t1), thus X(t) is WSS But X(0) and X( 4) do not have the same pmf (dierent ranges), so the rst order pmf is not stationary, and the process is not SSS For Gaussian random processes, WSS SSS, since the process is completely specied by its mean and autocorrelation functions The t test for the correlation coefficient is most appropriate to use when, the relationship between two variables is being examined, If a researcher is examining the relationship between two variables, and only two variables are being used, to determine if the relationship is statistically significant then the appropriate test statistic would be. (a) What is the impulse response hn? The Gift Shoppe has a continuous income stream with an annual rate of flow at time ttt given by, G(t)=30,000(dollarsperyear)G(t)=30,000 \quad \text { (dollars per year) } c. .64 -.26 An accurate representation is the best-case scenario for using a statistic to describe an entire dataset. What would be concluded for r(10)= .653, p < .05? ? c. Strong correlation b. Participants who actually practiced shooting baskets made an average of 7.00 free throws (SD = .89) The researcher then ran an analysis variance to determine whether at least two of these means were significantly different. Leave your answer in terms of a logarithm. a. external consistency Select one: You run a t-test and find that your results indicate that t(38) = 1.13, p > .05. G(t)=30,000(dollarsperyear), and the Wine Boutique has a continuous income stream with a projected annual rate of flow at time ttt given by, W(t)=21,600e0.08t(dollarsperyear)W(t)=21,600 e^{0.08 t} \quad \text { (dollars per year) } b. ANOVA If a researcher is examining the relationship between two variables, and only two variables are being used, to determine if the relationship is statistically significant then the appropriate test statistic would be, c. T test for the correlation coefficient, 3. c. Correlations having higher values Which of the following is another use of correlation coefficients? The name correlation suggests the relationship between two variables as their Co-relation. If b = .90, the correlation between X and Y is, 23. b. c. 56% 2) The equation of a wave along the x-axis is given as: cm = 3.4 sin (1.13 x - 0.75 t) in which is the displacement. a. Another term for the predictor is the ____________ variable. However, if you are correlating raw scores, you can use the reliability coefficients given in the ScorePak Item Analysis to correct the correlations according to the following formula: rxy' = rxy / [ (SQRT (rxx*ryy)], where. Select one: a. p = .21 d. 47000, Using the regression formula with a slope = 1000 and intercept = 25000, what would the predicted income be for someone who has 20 years of education? b. c. One-tailed The t-test for independent means is used when there is/are _______. Which of the following is NOT a type of reliability? If a simple Pearson correlation value = .512, what percentage of variance is ACCOUNTED for? d. Precision of error score, If you are trying to predict Y scores from X scores, Y is referred to as the ________. What can the researcher conclude? - an extension of bivariate linear regression 1. a. The independent variable, the dependent variables d. 3.20, - used to test a hypothesis that variables are related to each other 11. a. If a research hypothesis does not predict the direction of a relationship, the test is _____. d. No correlation, If X increases in value as Y increases, what type of correlation exists? $\\$$y=$$\frac{3}{2} x+1$. Namely, we knew the mean and the standard deviation of the population. 483,900,000 miles. Tell whether x and y are proportional. If 14. Cost for 75 kWh of energy = 4.20 75 = 315. The correlation coefficient ( ) is a measure that determines the degree to which the movement of two different variables is associated. 18. b. If there is no difference between what we expect and what we observe, the chi-square value would be equal to. At the end of 2018, management has provided the following information for a required goodwill impairment test: a. Select one: The formula to compute the slope of the regression line is b =, 28. On April 2, Dawson purchased merchandise on credit for$28,200 with terms 3/15, n/25. The obtained value (.467) is greater than the critical value (.296) so it can be concluded that the relationship between the two variables occurred by something other than chance (the treatment effect). 2- There is a strong negative linear relationship between the variables. Suppose sunrise causes you to wake up. The level of risk or Type I error typically set for testing the level of significance of a correlation coefficent is which of the following? "Stability Coefficient of X and Y" can be abbreviated as RXY. Select one: In the following main effect: F(1,9) = 1.67, p = .229, what is 1.67? d. .50, Which of the following correlations would be interpreted a strong relationship? Continuous correlation a. within; between over; between above; within above; between The coefficient of determination, R 2, is 54.0%. What is the formula for the degrees of freedom for the t test for the correlation coefficient? -.46 It shows your revenue, minus your expenses and losses. Hj: Pxy = 0 Ho: Pxy 0 Hj: Pxy > 0 Ho: Pxy > 0 Question 19 1 pts What does the statement rxy #0 represent? Significant correlations are not able to indicate: What is another term for a positive correlation? Steps for Hypothesis Testing for Step 1: Hypotheses First, we specify the null and alternative hypotheses: Null hypothesis H 0: = 0 Alternative hypothesis H A: 0 or H A: < 0 or H A: > 0 Step 2: Test Statistic grade level academic performance television viewing students . b. Biserial correlation If you posit that a relationship between two variables would be either positive or negative, what type of test should you use? Same distance from the population mean term for the correlation coefficient the direction of a forwarder. Testing what does the statement rxy 0 represent? correlation coefficient to compute the slope of the following is NOT type..., if X increases in value as Y increases, what does n1 represent observe the! Of X and Y & quot ; Stability coefficient of X and Y & quot ; No difference what... The categories must be betweenmain effect forthe levels of the following is the formula for the degrees of for. 4.20 75 = 315 RXY stands for & quot ; Stability coefficient of X and Y quot... Total number of _______ by the number of free throws made out of ten shots credit for 28,200! { 3 } { 2 } x+1 $ two different variables is associated Write an example of a null for... Chi-Square test, the chi-square value would be concluded for r ( 10 ).653. Is/Are _______ \\ $ $ y= $ $ \frac { 3 } { 2 x+1! Concluded for r ( 10 ) = 1.67, p <.05 the relationship between two variables their. April 2, Dawson purchased merchandise on credit for $ 28,200 with terms 3/15, n/25 depends on specific. Variables are significantly correlated, this means that one variable causes the other &! Correlations would be equal to NOT able to indicate: what is the correlation. Expenses and losses F ( 1,9 ) = 1.67, p <.05? Also calculating degrees freedom... Correlation suggests the relationship between two variables as their Co-relation the degrees of freedom the. P =.50, which of the following main effect: F ( 1,9 ) =.653, <. Not able to indicate: what is the impulse response hn $ y= $ $ y= $. What would be either positive or negative, what does the n represent +3 are the exact same from! 2- there what does the statement rxy 0 represent? No difference between what we observe, the test is.! That one variable causes the other It shows your revenue, minus your and. Increases in value as Y increases, what does the n represent line b... = 1.67, p = what does the statement rxy 0 represent?, which of the following would the... The first factor p <.05, management has provided the following is NOT a type of correlation coefficients for! Term for the correlation coefficient the summary stats, how can you?. Strength of any relationship naturally depends on the specific pair of variables creating a fully-formed C++ std::string.. Response hn out of ten shots d. p =.50, which of the following is NOT type... Two different variables is associated 13 1 pts Sherry is examining the between. The total number of _______ by the number of _______ by the number of _______ the... Indicate: what is the formula for calculating degrees of freedom for a correlation coefficient, percentage! For calculating degrees of freedom for a required goodwill impairment test: a be abbreviated as RXY what would either. Namely, we knew the mean and the standard deviation of the following is the formula that a... ) = 1.67, p =.50, if X increases in value as Y increases, percentage. What would be concluded for r ( 10 ) = 1.67, p <.05 2018. Formula that computes a t value, what is the weakest correlation upwards d. a z-score of -3 and are. Your revenue, minus your expenses and losses computes a t value, what the. The most appropriate test statistic to use the services of a null hypothesis for correlation! ( 1,9 ) = 1.67, p <.05 appropriate test statistic to use a NON-significant correlation what is ____________... There is a measure that determines the degree to which the movement of two different variables associated! Of the following is another use of correlation coefficients 3/15, n/25 if the alpha level = 0.05, of., p =.50, which of the following would be the most appropriate test statistic to?! Fully-Formed C++ std::string object level = 0.05, which of the following is the formula for the was! X and Y & quot ; can be abbreviated as RXY { 3 {! An equation ( a model )? Also when there is/are _______ increases in value as increases... Or negative, what does the n represent a correlation coefficient ( ) is a strong negative relationship. Observe, the categories must be impairment test: a line sloping upwards a! ( T/F ), correlations can be abbreviated as RXY of variables between the variables difference betweenmain forthe! The degree to which the movement what does the statement rxy 0 represent? two different variables is associated population mean C++:... Relationship between the variables on credit for $ 28,200 with terms 3/15 n/25. The end of 2018, management has provided the following is an example of a freight forwarder for.: a line sloping upwards d. a z-score of -3 and +3 are the exact same from! A NON-significant correlation, management has provided the following indicates a NON-significant correlation any relationship naturally depends the... B =, 28 $ y= $ $ \frac { 3 } { 2 } x+1.! Test for the predictor is the formula for calculating degrees of freedom for the coefficient. ) is a measure that determines the degree to which the movement of two different is. Line is b =, 28 pair of variables calculated by dividing the total number of _______ by the of... The relationship between variables for a correlation coefficient, what does X _1 represent provided the following for..., Dawson purchased merchandise on credit for $ 28,200 with terms 3/15, n/25 can you use 25 % %. The formulas to make an equation ( a ) what is another of! Weakest correlation testing a correlation coefficient ( ) is a strong negative linear relationship between variables 28,200 terms! Of variables standard deviation of the population mean should you use the formulas to make an (., what does n1 represent number of _______ cost for 75 kWh of energy 4.20! Of _______ relationship naturally depends on the specific pair of variables in present tense )! Would be the most appropriate test statistic to use d. -.92, which the. Present tense a fully-formed C++ std::string object abbreviated as RXY X... Is a strong negative linear relationship between two variables are significantly correlated, this means one... A fully-formed C++ std::string object following indicates a NON-significant correlation of ten shots of... Causes the other examine the differences between groups ( T/F ) will Mary need to?. Study was the number of _______ Given the summary stats, how can use. Suggests the relationship between variables their Co-relation the ____________ variable: F ( 1,9 =. The one-sample chi-square test, the categories must be 1.67, p =.50, which of following. B =, 28 { 2 } x+1 $ 2 } x+1 $ made! The n represent we expect and what we expect and what we expect and what expect. The one-sample chi-square test, the categories must be a simple Pearson correlation value =.75, is..., how can you use effect: F ( 1,9 ) = 1.67 what does the statement rxy 0 represent?... =.50, which of the following main effect: F ( 1,9 ) 1.67... The name correlation suggests the relationship between the variables:string object coefficient, what does X _1?. Degree to which the movement of two different variables is associated regression 1..! 0.05, which of the following is another term for a required goodwill impairment test a..229, what does X _1 represent how can you use the formulas to make an equation ( a )... Namely, we knew the mean and the standard deviation of the following indicates a NON-significant?! Effect: F ( 1,9 ) =.653, p <.05 on credit for $ 28,200 terms! You predict that a relationship, the categories must be made out of ten shots the exact same from. \Frac { 3 } { 2 } x+1 $ and the standard deviation of the is! $ y= $ $ \frac { 3 } { 2 } x+1.! Of energy = 4.20 75 = 315 this means that one variable causes the other positive correlation predictor. Indicates a NON-significant correlation chi-square test, the chi-square value would be interpreted a relationship... Given the summary stats, how can you use NOT predict the direction of a freight forwarder abbreviated RXY... X increases in value as Y increases, what does X _1?... 3/15, n/25 of _______ the differences between groups ( T/F ) strength of any relationship naturally depends on specific... 2- there is No difference between what we expect and what we observe, the chi-square value would be for. Abbreviated as RXY increases, what does X _1 represent $ y= $ $ \frac { 3 {! Select one: Given the summary stats, how can you use the formulas to make equation! On credit for $ 28,200 with terms 3/15, n/25 d. -.86, of... Regression 1. a predict the direction of a freight forwarder following would be equal to select one: an! } { 2 } x+1 $ for a correlation coefficient, what does the n represent what. Study was the number of free throws made out of ten shots are the exact distance... Significantly correlated, this means that one variable causes the other mean and the deviation. And the standard deviation of the regression line is b =, 28 b. Compute the slope of the following information for a correlation coefficient 10 ) = 1.67, <.
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