Question

The state test scores for 12 randomly selected high school seniors are shown on 1424 the right. Complete parts (a) through (C) below. 694 721 Assume the population is normally distributed. 630 1221 727 741 1440 981 831 542 940 (a) Find the sample mean. x = = 907.7 (Round to one decimal place as needed.) (b) Find the sample standard deviation. SE (Round to one decimal place as needed.)

Answer 1

Step- To Calcurte find the Meun ce data Now, N = 12 Sumpie Cebout Moun (x) the following A Moun (%) = Sxa n 1424 + 694 + 721 # 6307 1221 + 727 + 7441 +1440+ 981+ 831 +54 + 940 12 10892 12 Alen ) = 907.7

SHP-२ Standard To Cancuente Sample daviution (S) 14 Cxi-x 16.3 - 213. 72 630 - 1221 २77.1 313.3 - 1001 -1667 22.3 727 7A SHAR १k 631 (x;-) 266565.69 15667.69 34656.४१ 77.२१ 9x156.११ 3265२.49 27786.४१ 263343.२१ 537२.४१ 5662.69 1333 36,19 LDE२.२१ (४२)२- 10 12184.६९ -- 73.3 -76.7 SLA १० 3657 २२.२ sxi=106१२ x = {x. M 10१२ 12 X = 907.

Sumple Standard deviation - ({(xi-to) 2 nell 1012184.68 12-1 92016.79 sumpe Standard doriurion (5)= 303.34