Distinguish between random selection and random assignment.
What will be an ideal response?
Ques. 2In a sample of 18, the correlation between intelligence test scores and creativity test scores was found to be .40 . Do these data provide evidence for a significant relationship between these variables in the population? Test at the .05 level of significance (two tailed). Table A5 shows a correlation of .4683 for 16 degrees of freedom.
a. These data provide evidence of a significant relationship between intelligence and creativity.
b. These data do not provide evidence of a significant relationship between intelligence and creativity.
c. The significance of the relationship cannot be determined from the data given.
Ques. 3Distinguish the Hawthorne effect from the John Henry effect in experimental research.
What will be an ideal response?
Ques. 4When testing the statistical significance of a correlation coefficient, the null hypothesis states
a. p = 0, the population correlation is zero.
b. p = +1.00 or -1.00, the population correlation is +1.00 or -1.00.
c. r = 0, the sample correlation is zero.
d. r = +1.00 or -1.00 the sample correlation is +1.00 or -1.00.
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