Question

In: Statistics and Probability

A researcher measures the relationship between sleep medication use (times used per week) and time spent...

  • A researcher measures the relationship between sleep medication use (times used per week) and time spent working (in hours per week). Answer the following questions based on the results provided.
    Sleep Medication Use Time Spent Working
    9 16
    4 39
    7 18
    2 31
  • Part A) Compute the Pearson correlation coefficient. (Round your answer to three decimal places.)
  • Part B) Multiply each measurement of drug use times 3 and recalculate the correlation coefficient. (Round your answer to three decimal places.)
  • Part C) Divide each measurement in half for time spent working and recalculate the correlation coefficient. (Round your answer to three decimal places.)

Solutions

Expert Solution

The statistical software output for this problem is:

Also correlation doesn't get affected by change in scale or origin. Hence,

A) r = -0.824

B) r = -0.824

C) r = -0.824


Related Solutions

A researcher measures the relationship between sleep medication use (times used per week) and time spent...
A researcher measures the relationship between sleep medication use (times used per week) and time spent working (in hours per week). Answer the following questions based on the results provided. Sleep Medication Use Time Spent Working 8 16 3 39 7 19 2 30 A) Compute the Pearson correlation coefficient. (Round your answer to three decimal places.) _____ B) Multiply each measurement of drug use times 3 and recalculate the correlation coefficient. (Round your answer to three decimal places.) _____...
A researcher measures the relationship between sleep medication use (times used per week) and time spent...
A researcher measures the relationship between sleep medication use (times used per week) and time spent working (in hours per week). Answer the following questions based on the results provided. Sleep Medication Use 9,4, 7, 3 Time Spent Working 16, 38, 18, 31 Compute the Pearson correlation coefficient. (Round your answer to three decimal places.) Multiply each measurement of drug use times 3 and recalculate the correlation coefficient. (Round your answer to three decimal places.) Divide each measurement in half...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per week) in a sample of 10 students. The following table lists the hypothetical results of this study. Internet Use Social Interaction X Y 7 5 9 5 5 8 6 7 13 6 5 7 3 3 5 5 1 10 12 2 (a) Compute the Pearson correlation coefficient. (Round your answer to three decimal places.) (b) Compute the coefficient of determination. (Round your...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per week) in a sample of 10 students. The following table lists the hypothetical results of this study. Internet Use Social Interaction X Y 7 5 8 7 4 8 8 7 12 5 5 7 4 2 7 6 1 10 11 4 (a) Compute the Pearson correlation coefficient. (Round your answer to three decimal places.) (b) Compute the coefficient of determination. (Round your...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per week) in a sample of 10 students. The following table lists the hypothetical results of this study. Internet Use Social Interaction X Y 5 5 9 6 4 8 7 7 11 6 3 7 2 3 6 5 1 10 11 4 (a) Compute the Pearson correlation coefficient. (Round your answer to three decimal places.) (b) Compute the coefficient of determination. (Round your...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per week) in a sample of 10 students. The following table lists the hypothetical results of this study. Internet Use Social Interaction X Y 6 5 7 5 4 7 8 7 13 5 4 8 4 3 6 4 1 10 11 2 (a) Compute the Pearson correlation coefficient. (Round your answer to three decimal places.)    (b) Compute the coefficient of determination. (Round...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per week) in a sample of 10 students. The following table lists the hypothetical results of this study. Internet Use Social Interaction X Y 5 4 8 5 5 6 8 6 11 5 4 6 3 3 7 5 2 11 12 3 (a) Compute the Pearson correlation coefficient. (Round your answer to three decimal places.) ____ (b) Compute the coefficient of determination. (Round...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per...
A researcher measures the relationship between Internet use (hours per week) and social interaction (hours per week) in a sample of 10 students. The following table lists the hypothetical results of this study. Internet Use X = 6 8 5 6 13 5 4 5 3 10 Social Interaction Y= 4 5 7 7 4 7 2 6 9 4 (a) Compute the Pearson correlation coefficient. (Round your answer to three decimal places.) (b) Compute the coefficient of determination. (Round...
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" 8 15 4 38 7 18 2 32 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...
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 15 3 37 7 17 2 32 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...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT