A) Formulate the hypotheses using the appropriate notation. B) Calculate the test statistic showing 3 places after the decimal. C) Find the p-value from the theoretical distribution area in Stat Key D) Write your conclusion in the language of the problem. 1. The mean time it took a customer service department to process a customer complaint in 2014 was 11.4 minutes. A new process was incorporated that required less work. Before fully adopting the new process the company wanted to see if there was evidence that the mean time to process the complaints had changed under the new process. In a sample of 51 complaints handled with the new process the mean time was 13.1 minutes with a standard deviation of 4.2 minutes. At the 5% significance level can we claim that the mean time to process a complaint has changed.
A) Formulate the hypotheses using the appropriate notation.
B) Calculate the test statistic showing 3 places after the decimal.
C) Find the p-value from the theoretical distribution area in Stat Key
D) Write your conclusion in the language of the problem.
1. The
Step by step
Solved in 2 steps with 4 images
