11. Which is not true of the coefficient of determination? a. It is the square o
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11. Which is not true of the coefficient of determination? a. It is the square of the coefficient of correlation. b. It is negative when there is inverse relationship between X and Y c. It reports the percent of the variation in Y explained by X. d. It is based on sum of squares (SSR, SSE, and SST 12·The coefficient of correlation (slope of the line) a. Can range from -1.00 to +1.00 b. Is also called Pearson's r c. Can be tested for significance using a t-test. d. Have all the above properties 13. If n 50 andr 0.8296, the corresponding t-statistic to test Ho:r-o a. 0.3609 b. 7.862 c. 2.048 d. Need the value to answer. 14. In a given set of paired data (X and Y), if the value of Y is independent of the value of X, then we expect the value of correlation coefficient (r) to be- 15. In a given set of paired data (K and Y), if the value of Y is linearly dependent on value of X then we expect the value ofcorrelation coefficient (r) to be 16. Is it possible that Y be closely dependent upon X even when correlation coefficient ) Questions 17-18. A researcher has a large number of data set on age and height of humans from birth to age 70. He computes a correlation coefficient. 17. Would you expect the correlation coefficient to be positive or negative? 18. Do you expect the correlation to stand (to be valid) for all ages? Yes, No. 19. Complete following ANOVA table (Score 6) Source Degrees of freedom Sum of Squares Mean Squares FRatioP-value 10 4.82 Treatment Error Total 5.61 20. One-way ANOVA was conducted for 4 treatment groups with 6 subjects in each group. What would be the decision about Ho if a is set at 0.052 (Score 10) Source Sum of Squares Degrees of freedom Mean Squares F Ratio Pvalue Treatment 33 Error Total o is 145Explanation / Answer
11. Coefficient of determination is square of correlation coefficient so it cant be negative
Hence b is not true.
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