A random sample of 6 vehicles on the highway had their speed checked. The speeds, in miles per hour, are listed below. 62 75 81 68 72 74 For the given data, find the mean. For the given data, find the...

A random sample of 6 vehicles on the highway had their speed checked. The speeds, in miles per hour, are listed below.

62      75      81      68      72      74

1. For the given data, find the mean.


2. For the given data, find the five-number summary.


3. For the given data, find the interquartile range.


4. For the given data, find the standard deviation.