Elaine rolls a 20-sided die a total of 7 times. Her results are given below:

20 5 18 8 7 6 20

a. What is the range? Explain your answer. (2 points) range = explain: b. Determine the mean of Elaine's die rolls by using the formula for mean. Make sure to explain your answer or show your work. (3 points) X = explain:c. Complete the table below. (3 points) X X - X (x - x)2 20 20 18 8 7 6 5 Total:Using your work from c., determine the sample standard deviation to the nearest hundredth. Explain your answer. [4 points) 5 : explain: Determine the variance, to the nearest whole amount Make sure to explain your answer. [1.5 points} 52 = explain