Use the given data to find the minimum sample size required to estimate a popula

Question

Use the given data to find the minimum sample size required to estimate a population proportion or percentage.

Take a Test - Pamela Baptiste Harris - Internet Explorer P https://www.mathxl.com/Student/PlayerTest.aspx?testld 124126668&centerwin-yes; Pamela Baptiste Harris 3/15/16 11:20 AM Quiz: Module 5, Quiz Submit Quiz This Question: 2 pts 4 of 13 (1 complete) This Quiz: 24 pts possible := Question Help Use the given data to find the minimum sample size required to estimate a population proportion or percentage Margin of error: nine percentage points, confidence level 95%; from a prior study, p is estimated by the decimal equivalent of 42% n R | (Round up to the nearest integer.) Enter your answer in the answer box 2 10:20 AM 3/15/2016 Search the web and Windows

Explanation / Answer

Critical value at 95% = 1.96, p=0.42

Margin of error = (Critical value)*sqrt(p*(1-p)/n)

0.09 = 1.96*sqrt(0.42*0.58/n)

sqrt(n) = 1.96*sqrt(0.42*0.58)/0.09 = 10.74

n = 10.74^2 = 115.53 = 116

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