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(TCO C) A marketing research firm wishes to estimate the proportion of adults who are planning to buy a new car in the next 6 months.

6. (TCO C) 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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(TCO C) 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...

Sign up to view the full answer

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