Question
A researcher obtains a Pearson correlation of r = 0.60 for a sample ofn= 6 pairs of X and Y scores. If the researcher tests
A researcher obtains a Pearson correlation of r = 0.60 for a sample ofn= 6 pairs of X and Y scores. If the researcher tests the significance of the correlation, what value will be obtained for the t statistic?
A. | 0.6/1.0 = 0.6 |
B. | 0.6/0.16 = 3.75 |
C. | 0/6/0.8 = 0.77 |
D. | 0.6/0.4 = 1.50 |
The Pearson correlation is calculated for a sample ofn= 20 individuals. If a hypothesis test is used to determine whether the correlation is significant, what df value would be used for the t statistic?
A. | 21 |
B. | 19 |
C. | 20 |
D. | 18 |
A set ofn= 15 pairs of X and Y scores has SSX= 10, SSY= 40, and SP = 30. What is the slope for the regression equation for predicting Y from X?
A. | 10/30 |
B. | 10/40 |
C. | 40/10 |
D. | 30/10 |
An analysis of variance produces SSbetween= 30, SSwithin= 60, and an F-ratio with df = 2, 15. For this analysis, what is the F-ratio?
A. | 15/4 = 3.75 |
B. | 4/15 = 0.27 |
C. | 30/60 = 0.50 |
D. | 60/30 = 2.00 |
A researcher used a sample ofn= 50 individuals to determine whether they are any preferences between two new designs for a smart phone. If the data produce a chi-square statistic of2= 6.00 what decision should the researcher make?
A. | There is no significant preference for either= .05 or= .01. |
B. | There is no significant preference for= .05 but there is for= .01. |
C. | There is a significant preference for= .05 but not for= .01. |
D. | There is a significant preference for either= .05 or= .01. |
An independent-measures research study compares three treatment conditions using a sample ofn= 10 in each treatment. For this study, the three sample means are M1= 1, M2= 2, and M3= 3. For the ANOVA, what value would be obtained for SSbetween?
A. | 20 |
B. | 2 |
C. | 10 |
D. | 30 |
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