Compute the 95 confidence interval for the proportion of, Ask an Expert

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A marketing research firm wishes to estimate the proportion of adults who are planning to buy a new car in the next 6 months. A simple random sample of 100 adults led to 22 who were planning to buy a new car in the next 6 months.

a. Compute the 95% confidence interval for the proportion of adults who are planning to buy a new car in the next 6 months.

b. Interpret this confidence interval.

c. How large a sample size will need to be selected if we wish to have a 95% confidence interval that is accurate to within 1%.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9367126

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