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In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA...

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Statistics

In a recent year, the Better Business Bureau settled 75% ofcomplaints they received. (Source: USA Today, March 2, 2009) Youhave been hired by the Bureau to investigate complaints this yearinvolving computer stores. You plan to select a random sample ofcomplaints to estimate the proportion of complaints the Bureau isable to settle. Assume the population proportion of complaintssettled for the computer stores is the 0.75, as mentioned above.Suppose your sample size is 105. What is the probability that thesample proportion will be within 10 percent of the populationproportion?

Note: You should carefully round any z-values you calculate to 4decimal places to match wamap's approach and calculations.

Answer =  (Enter your answer as a number accurate to 4decimal places.)

Answer & Explanation Solved by verified expert
3.7 Ratings (529 Votes)
Population proportion p 075Within 10 means within 075 010 and 075 010 065 and085Sample proportion    See Answer
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