For the data set 7, 5, 10, 11, 12, the mean, x, is 9. What is the standard deviation? The formula for the sample standard deviation is s = 1 Z(x-x)? Vn-1 Use the table to help you. X - X (x - 2)2 4 -2 5 -4 1 2 4 9 Sum = Round your answer to the nearest tenth. ( A. 2.6
B. 6.8
C. 8.5
D. 2.9

Leo is going to use a random number generator 4 0 0 400 times. each time he uses it, he will get a 1 , 2 , 3 , 4 , 1,2,3,4, or 5 5. what is the best prediction for the number of times that leo will get an odd number?

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.