A researcher measures the relationship between the number of interruptions during a class and time spent...

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A researcher measures the relationship between the number of interruptions during a class and time spent...

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"

9 17

3 40

6 19

2
31
Compute the Pearson correlation coefficient. (Round your answer to three decimal places.)
Multiply each measurement of interruptions times 3 and recalculate the correlation coefficient. (Round your answer to three decimal places.)
Divide each measurement in half for time spent "on task" and recalculate the correlation coefficient. (Round your answer to three decimal places.)

math Statistics-And-Probability

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Answer 1

Answer #1

Pearson correlation coefficient doesn't change with the change of scale. Hence,

a) Pearson correlation coefficient

= correl(Interruptions, Time spent) [Excel Formula]

= -0.841

b) Pearson correlation coefficient = -0.841

c) Pearson correlation coefficient = -0.841

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Answer 2

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