Find the sum of the interior angle measures of a convex decagon (a ten-sided polygon) ?

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

What is the percentile for data value 6 in the following data set? 4 13 8 6 4 4 13 6 4 13 2 13 15 5 9 4 12 8 6 13 40 25 35 62