To find the number of people they would need to interview.
Answer to Problem 9.13E
The number of people = 1844
Explanation of Solution
Given:
Confidence level = c = 0.99
Margin of error = 3% = 0.03
Formula:
Calculation:
Confidence level = c = 0.99, so level of significance = a = 1-0.99 − 0.01
Z critical value can be found either by using standard normal table or excel formula.
So, Zc =Za/2 = Z0.01/2
Using excel
Zc = 2.58
We don’t have preliminary population proportion, hence using p = 0.05
Chapter 9 Solutions
Statistics Through Applications
Additional Math Textbook Solutions
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