The formula for the standard deviation of a sample is: n S= 1 E(,-X)2 n- 1 /=1 Select the true statement for the following data set that has a mean of 9: 3, 7, 8, 8, 8, 9, 10, 10, 13, 14 Answer choices are rounded to the hundredths place. O The variance is 3.09 and the standard deviation is 9.56. The variance is 9.56 and the standard deviation is 8.50. O The variance is 8.50 and the standard deviation is 3.09. O The variance is 9.56 and the standard deviation is 3.09