SOLUTION: Find the minimum sample size n needed to estimate for the given values of​ c,o ​, and E. c​=.90,o=7.2 ​,and E=2 Assume that a preliminary sample has at least 30 member

Algebra ->  Probability-and-statistics -> SOLUTION: Find the minimum sample size n needed to estimate for the given values of​ c,o ​, and E. c​=.90,o=7.2 ​,and E=2 Assume that a preliminary sample has at least 30 member      Log On


   

Question 1173033: Find the minimum sample size n needed to estimate for the given values of​ c,o ​, and E.
c​=.90,o=7.2 ​,and E=2
Assume that a preliminary sample has at least 30 members.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi, 

c​=.90,o=7.2 ​,and E=2

ME =%28+z%2Asigma%29%2Fsqrt%28n%29

n = %28%281.645%2A7.2%29%2F2%29%5E2%29  = 35.07  0r 36 is the sample size needed



 = CI	z = value

90%	z =1.645

92%	z = 1.751

95%	z = 1.96

98%	z = 2.326

99%	z = 2.576