Answered: A company's customer service department…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

A company's customer service department asks its customers to rate their over-the-phone service on a scale of 1-20 immediately after their service had been completed. The company then matches each customers rating with the number of minutes the person waited on hold. The accompanying table shows the ratings and numbers of minutes on hold for 10 randomly selected customers.

MINUTES	RATING
2	14
8	15
4	18
7	11
10	10
4	20
6	10
0	16
5	14
4	14

a) calculate the sample covariance.

sxy =

b) calculate the sample correlation coefficient

rxy =

c) describe the relationship between x and y.

Please help! i don't understand.

A company's customer service department asks its customers to rate their over-the-phone service on a scale of 1-20 immediately after their service has been
completed. The company then matches each customer's rating with the number of minutes the person waited on hold. The accompanying table shows the ratings and
numbers of minutes on hold for 10 randomly selected customers. Complete parts a through c below.
1 c
Click the icon to view the data table.
a. Calculate the sample covariance.
Sxy =
(Round to two decimal places as needed.)
b. Calculate the sample correlation coefficient.
Ixy =]
(Round to two decimal places as needed.)
1 a
c. Describe the relationship between x and y. Choose the correct answer below.
O A. There is a perfect negative linear relationship between the two variables.
O B. There is a negative linear relationship between the two variables.
O C. There is a perfect positive linear relationship between the two variables.
0 o
O D. There is a positive linear relationship between the two variables.
O E. There is no linear relationship between the two variables.
0 o

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