Ignore the 8pts part thats just how much its worth for each.

I need help correcting part b and doing part c.

16. The average point score for 5 students on an Economics exam was 71 with a standard deviation of 6.8 points. (8 pts a- 2pts, b-4pts, c-2 pts) All work done by hand, not by the calculator. The following are point scores of 5 different students on the exam. 53, 57, 81, 85, 94 a) Find the mean. b) Find the standard deviation. l have provided a table as a visual to help organize your work on your scratch paper. Organizing your work on scratch paper will help to type in the work so that I understand what you are doing. Show your steps. b) Find the standard deviation. l have provided a table as a visual to help organize your work on your scratch paper. Organizing your work on scratch paper will help to type in the work so that I understand what you are doing. Show your steps. c) Which group is more consistent when it comes to their point scores? Explain using any statistics observed. Your Answer: a. mean =74 x= (53,57,81,85,94) n=5 I236 =53+57+81+85+94=87a c) Which group is more consistent when it comes to their point scores? Explain using any statistics observed. Your Answer: a. mean =74 x= (53,57,81,85,94) n=5 2x =53+57+81+85+94=87| 22 = 532 + 572 + 812 + 852 + 942 = 28680 2 b) standard deviation = =18.0278 a) correct b) I have no idea where you got this from. It is not in the book nor in my notes. What formula are you using? no answer for part c