from the following data:
6.28 7.06 6.50 6.76 6.82 6.92 6.86 7.15 6.57 6.48
6.64 6.94 6.49 7.14 7.16 7.10 7.08 6.48 6.40 6.54
A. find the mean and the median
B. Find the variance and standard deviation
C. If the desired tread depth on these tires is 7mm, what can you say about the quality of these tires?