Question

need answer not formulas

question#1

question#2

question#3

his Question: 1 pt 10 of 20 (0 complete) This Test: 20 The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) below Assume the population is noemaly distributed 3.4 0.9 1.3 2.3 2.7 5 4.0 3.8 3.4 1.9 2.4 0.3 (a) Find the sample mean xs[](Round to two decimal places as. needed.) b) Find the sample standard deviation Round to twro decimasl places as needed ) (Round to two decimal needed) A 9g% corhtence rterval Sor re population mean is (DD Round to two decimal places as needed.) Test: Chapter 6 TEST This Question: 1 pt 11 of 20 (0 complete) Let p be the population proportion for the following condition. Find the point estimates for p and q. Of 916 children surveyed, 127 plan to join the amed forces in the future The point estimate for p. p, is (Round to three decimal places as needed) The point estmate for q, q. is Round to three decimal places as needed.) Ihis Question: 1 pt 12 of 20 (0 complete) Find the minimum sample size n needed to estimate μ for the given values of c. and E. cz 0.90, ơ 8.9, and E: 1 Assume that a preliminary sample has at least 30 members. (Round up to the nearest whole number.)

Answer 1

1)

sample mean =2.38

sample std deviation =1.16

99% CI =1.34 ,3.42

2)

point estimate of p =0.139

point estimate of q =0.861

3)

n=215