Question

A researcher measures the relationship between the number of interruptions during a class and time spent "on task" (in minutes). Answer the following questions based on the results provided. Number of Interruptions Time Spent "On Task" 10 16 6 37 8 19 5 31 Part (a) Compute the Pearson correlation coefficient. (Round your answer to three decimal places.) Part (b) Multiply each measurement of interruptions times 3 and recalculate the correlation coefficient. (Round your answer to three decimal places.) Part (c) Divide each measurement in half for time spent "on task" and recalculate the correlation coefficient. (Round your answer to three decimal places.)

Answer 1

The statistical software output for this problem is:

From above output:

a) Correlation coefficient = -0.876

Also correlation coefficient doesn't depend on change of scale or origin. Hence,

b) Correlation coefficient = -0.876

c) Correlation coefficient = -0.876