Is college worth it? Among a simple random sample of 348 American adults who do not...

Is college worth it? Among a simple random sample of 348 American adults who do not have a four-year college degree and are not currently enrolled in school, 157 said they decided not to go to college because they could not afford school.

1. Calculate a 90% confidence interval for the proportion of Americans who decide to not go to college because they cannot afford it, and interpret the interval in context. Round to 4 decimal places.

( , )

2. Suppose we wanted the margin of error for the 90% confidence level to be about 2.25%. What is the smallest sample size we could take to achieve this? Note: For consistency's sake, round your z* value to 3 decimal places before calculating the necessary sample size.

Choose n =

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orchestra answered 1 year ago

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