SOLUTION: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately
σ= 33.8 You would like to
Algebra ->
Probability-and-statistics
-> SOLUTION: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately
σ= 33.8 You would like to
Log On
Question 1197460: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately
σ= 33.8 You would like to be 98% confident that your estimate is within 10 of the true population mean. How large of a sample size is required? Answer by ewatrrr(24785) (Show Source):
Hi
98% confident ⇒ z = 2.326
σ = 33.8, ME = 10
How large of a sample size is required?
0r
n =
n = = 61.8 0r sample Size = 62 (always round Up)
= CI z = value
90% z =1.645
92% z = 1.751
95% z = 1.96
98% z = 2.326 Invnorm(.99) 2-sided (.98 + .02/2 = .99 )
99% z = 2.576
Wish You the Best in your Studies.
