A researcher measures the correlation of the time it take participants to complete two tasks purported to measure the same cognitive skill.Participant times are converted to ranks from fastest to slowest.If = 165 and n = 20,then what is the decision for this correlation test?
A)Retain the null hypothesis.
B)Reject the null hypothesis.
C)There is not enough information to answer this question.

Question

A researcher measures the correlation of the time it take participants to complete two tasks purported to measure the same cognitive skill.Participant times are converted to ranks from fastest to slowest.If  = 165 and n = 20,then what is the decision for this correlation test?
A)Retain the null hypothesis. 
B)Reject the null hypothesis. 
C)There is not enough information to answer this question.

Quizplus · Accepted Answer

Since the researcher is measuring the correlation between two tasks, the null hypothesis would be that there is no correlation between the two tasks. If the p-value is less than the alpha level (i.e. typically 0.05), then the null hypothesis would be rejected, indicating that there is a significant correlation. Without knowing the actual correlation coefficient or the significance level, it is impossible to calculate the p-value, but assuming a typical level of alpha, the decision would be to reject the null hypothesis if the p-value is less than 0.05.

A Researcher Measures the Correlation of the Time It Take