## Elementary Statistics (12th Edition)

a) Mean= $0.78$ Standard Deviation=$0.0044$ b) Min:$0.77$ Max:$0 .795$
a) We know that the mean is equal to the sum of all of the data points divided by the number of data points. Doing this, we find that the mean is $0.78$. In addition, using the standard deviation function in Microsoft Excel, we find that the standard deviation is $0.004$. b) We use $z=±3.4$ to find: $max=(3.4)(0.0044)+0.78=0.795$ $min=(−3.4)(0.0044)+0.78=0.77$