Wells Fargo Bankâs 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:
Time to Complete the Call (in seconds) English-Speaking 131 80 140 118 79 94 103 145 113 100 122
Spanish-Speaking 170 177 150 208 151 127 147 140 109 184 119 149 129 152
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 Spanishspeaking 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