Mathematics, 10.03.2020 17:01, tayshawngooch
In 2008 the Better Business Bureau settled 75% of complaints they received (USA Today, March 2, 2009). Suppose you have been hired by the Better Business Bureau to investigate the complaints they received this year involving new car dealers. You plan to select a sample of new car dealer complaints to estimate the proportion of complaints the Better Business Bureau is able to settle. Assume the population proportion of complaints settled for new car dealers is .75, the same as the overall proportion of complaints settled in 2008.
a. Suppose you select a sample of 450 complaints involving new car dealers. Show the sampling distribution of p¯.b. Based upon a sample of 450 complaints, what is the probability that the sample proportion will be within .04 of the population proportion?c. Suppose you select a sample of 200 complaints involving new car dealers. Show the sampling distribution of p¯ .d. Based upon the smaller sample of only 200 complaints, what is the probability that the sample proportion will be within .04 of the population proportion?e. As measured by the increase in probability, how much do you gain in precision by taking the larger sample in part (b)?
Answers: 3
Mathematics, 21.06.2019 18:30, FailingstudentXD
Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.
Answers: 3
Mathematics, 21.06.2019 22:30, smarty5187
One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?
Answers: 1
In 2008 the Better Business Bureau settled 75% of complaints they received (USA Today, March 2, 2009...
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