Use the confidence interval, (36.482, 41.352), to answer the questions.
What is the margin of error, E?
What is the sample mean, x?
Let c = 0.99, σ = 3.7, and E = 2.2. What is the minimum sample size, n, needed to estimate μ
margin of error, E =(41.352-36.482)/2=2.435
sample mean, x =(41.352+36.482)/2=38.917
2)
for 99 % CI value of z= | 2.576 |
standard deviation σ= | 3.70 |
margin of error E = | 2.2 |
required sample size n=(zσ/E)^{2 } = | 19.0 |
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