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QUESTION
A 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...
Construct a 95% confidence interval for the average rating given by a customer who waits 19 minutes.
UCL =
LCL =
Construct a 95% prediction interval for the rating given by a customer who waits 19 minutes.
UCL =
LCL =
Below I solved for the other components, but what I need is the UCL and LCL
A 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 department then matches each customer's rating with the number of minutes theperson waited on hold. The accompanying table shows the ratings and number of minutes on hold for 10 randomly selected customers. The regression line for the data is y = 16.435 - 0.299x. Use this information to complete parts a through d.Click the icon to view the table showing ratings and number of minutes on hold for 10 customers.a. Calculate the coefficient of determination.R? = 0.089 (Round to three decimal places as needed.)b. Using a = 0.05, test the significance of the population coefficient of determination.Determine the null and alternative hypotheses.Ho:H1: p2The F-test statistic is 0.78 . (Round to two decimal places as needed.)The p-value is 0.403 . (Round to three decimal places as needed.)Because the p-value is greater than a, do not reject thenull hypothesis.There is not enough evidence to conclude that the coefficient of determination is significant.c. Construct a 95% confidence interval for the average rating given by a customer who waits 13 minutes.UCL = (Round to two decimal places as needed.)LCL = (Round to two decimal places as needed.)