Question

Use the confidence interval, (36.482, 41.352), to answer the questions. What is the margin of error,...

Use the confidence interval, (36.482, 41.352), to answer the questions.

  1. What is the margin of error, E?

  2. What is the sample mean, x?

  3. Let c = 0.99, σ = 3.7, and E = 2.2. What is the minimum sample size, n, needed to estimate μ

Homework Answers

Answer #1

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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