Due in 18 hours, 48 minutes. Due Tue 03/06/2018 7:00 am | In a recent year, the

Question

Due in 18 hours, 48 minutes. Due Tue 03/06/2018 7:00 am | In a recent year, the Better Business Bureau settled 75% of complaints they received. (Source: USA Today, March 2, 2009) You have been hired by the Bureau to investigate complaints this year involving computer stores. You plan to select a random sample of complaints to estimate the proportion of complaints the Bureau is able to settle. Assume the population proportion of complaints settled for the computer stores is the 0.75, as mentioned above. Suppose your sample size is 122. What is the probability that the sample proportion will be at least 2 percent more than the population proportion? Note: You should carefully round any z-values you calculate to at least 4 decimal places to match wamap's approach and calculations. Enter your answer as a number accurate to 4 decimal places) Answer = Points possible: 1 This is attempt 1 of 1 License Submit

Explanation / Answer

for normal distribution z score =(p-p)/p here population proportion=     p= 0.750 sample size       =n= 122 std error of proportion=p=(p*(1-p)/n)= 0.0392 probability = P(X>0.77) = P(Z>0.51)= 1-P(Z

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