Sample precent

[khitchcock82]

I'm looking for help in determining what percent of a sample would have a value between 12.84 and 27.88 if the mean is 20.36 and the standard deviation is 3.76?

 

[Deleted member 4993]

I'm looking for help in determining what percent of a sample would have a value between 12.84 and 27.88 if the mean is 20.36 and the standard deviation is 3.76?

Use z-distribution table.

 

[khitchcock82]

From using the z distribution I came up with 95 percent is there any way to check that?