SOLUTION: Find the minimum sample size n needed to estimate μ for the given values of​ c, σ​, and E. c=0.98​, σ=9.1​, and E=2 Assume that a preliminary sample has at least 30 me

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Question 1178987: Find the minimum sample size n needed to estimate μ for the given values of​ c, σ​, and E.
c=0.98​, σ=9.1​, and E=2
Assume that a preliminary sample has at least 30 members.
n=
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

Hi
c=0.98​, σ=9.1​, and E=2
Assume that a preliminary sample has at least 30 members: z(.98 CI) = 2.326
  OR  n = 
 n = (2.326*9.1/2)^2 = 103.5  
minimum sample size n needed:  104

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


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