Case 2: Secret Shoppers "Secret shoppers" are often employed by retailers to randomly rate the customer service quality of their employees. One such retailer has just received ratings for 15 of their...

6. What value is the degrees of freedom? 7. Given the desired confidence level, what alpha should be used? 8. What is the P value equal to for this test? 9. According to the P value, is the main difference statistically significant? 10. Based on the results, can you reject the null hypothesis? 11. Is the entire staff operating at a good level?

Extracted text: Case 2: Secret Shoppers "Secret shoppers" are often employed by retailers to randomly rate the customer service quality of their employees. One such retailer has just received ratings for 15 of their employees. Ratings are measured on a scale of 1 to 5 (5 being the highest). The retailer sets a value of 3 as "good." The retailer wants to determine if the entire staff is operating at a "good" level, or at some other level. The retailer wants to be 90% confident that the results are true and not a result of random chance. The retailer conducts a one-sample, t-test (see results in K2:M7). t-Test: One-Sample Mean (rating) 2.88 Variance Observations t-statistic P(t T) two-tail 2.41 15 -0.30 0.766


Extracted text: What value is the Degrees of Freedom? Given the desired confidence level, what alpha should be used? What is the p-value equal to for this this test? According to the p-value, is the mean difference statistically significant? Based on the results, can you reject the null hypothesis (Ho)? Is the entire staff operating at a "good" level? Iselect] [select] [select] Iselect] 10 [select] 11 [select]