Question: Wells Fargo Bank's call center has representatives that speak both English and Spanish. A random sample of 11 calls to English-speaking service representatives and a random sample of 14 calls to Spanish-speaking service representatives was taken and the time to complete the calls was measured. The results (in seconds) are as follows:
a. Compute the mean and standard deviation for the time to complete calls to English-speaking service representatives.
b. Compute the mean and standard deviation for the time to complete calls to Spanish-speaking service representatives.
c. Compute the coefficient of variation for the time to complete calls to English-speaking and Spanish speaking service representatives. Which group has the greater relative variability in the time to complete calls?
d. Construct box and whisker plots for the time required to complete the two types of calls and briefly discuss.