SOLUTION: Assuming that the samples come from normal distributions, find the margin of error given the following: A.n=10, sample mean= 28, s=4.0, 90% confidence B.n= 16, sample mean=50, s=

Algebra ->  Probability-and-statistics -> SOLUTION: Assuming that the samples come from normal distributions, find the margin of error given the following: A.n=10, sample mean= 28, s=4.0, 90% confidence B.n= 16, sample mean=50, s=      Log On


   

Question 1174401: Assuming that the samples come from normal distributions, find the margin of error given the following:
A.n=10, sample mean= 28, s=4.0, 90% confidence
B.n= 16, sample mean=50, s=4.2, 95% confidence
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
Note Table Below:
ME =+z%2Asigma%2Fsqrt%28n%29
A.n=10, sample mean= 28, s=4.0, 90% confidence
 ME =+1.645%2A4%2Fsqrt%2810%29
28 - ME < mu < 28 + ME

B.n= 16, sample mean=50, s=4.2, 95% confidence
   ME =+1.96%2A4.2%2Fsqrt%2816%29
50 - ME < mu < 50 + ME

Wish You the Best in your Studies.

 = CI	z = value
90%	z =1.645
92%	z = 1.751
95%	z = 1.96
98%	z = 2.326
99%	z = 2.576