10 samples of 25 gas stations are selected at random and the price of regular gasoline is recorded for each gas station. The sample means are shown for the 10 samples:

$2.38 $2.42 $2.64 $2.35 $2.65 $2.47 $2.67 $2.59 $2.63 $2.41.

Q1. Use the sample mean to estimate the mean of the population

Q2. Find the standard deviation of the sample means

Q3. Use the standard deviation of the sample means to estimate the margin of error.