Question

Please respond to this question whith as much info as you can give and please make it concise.

13. For the given population of 2nd midterm Materials Science scores, calculate the population mean, the standard deviation, and the probability that any given score will fall between the mean and 21. (You may use electronic aids, but make sure that you will be capable of doing this on a quiz, using only a calculator). Exam 2 Scores 24.5 21 20.84 20.5 20 19.42 19.34 19 19 19 19 18.84 18.5 18.5 17.5 17 16.84 16.17 15.84 15.7 15.5 15.34 15 15 15 15 14.5 14.34 11.5 Page 4 of 4

Answer 1

Exam 2 Score (Xi)	di= (Xi - Mean)	di^2 = (Xi - Mean) ^2
24.5	7.0053	49.0742
21	3.5053	12.2871
20.84	3.3453	11.191
20.5	3.0053	9.0318
20	2.5053	6.2765
19.42	1.9253	3.7068
19.34	1.8453	3.4051
19	1.5053	2.2659
19	1.5053	2.2659
19	1.5053	2.2659
19	1.5053	2.2659
18.84	1.3453	1.8098
18.5	1.0053	1.0106
18.5	1.0053	1.0106
17.5	0.0053	0
17.17	-0.3247	0.1054
17	-0.4947	0.2447
16.84	-0.6547	0.4286
16.17	-1.3247	1.7548
15.84	-1.6547	2.738
15.7	-1.7947	3.2209
15.5	-1.9947	3.9788
15.34	-2.1547	4.6427
15	-2.4947	6.2235
15	-2.4947	6.2235
15	-2.4947	6.2235
15	-2.4947	6.2235
14.5	-2.9947	8.9682
14.34	-3.1547	9.9521
11.5	-5.9947	35.9364