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In: Statistics and Probability

_____ A random sample of 1003 U.S. adults was asked “Do you pretty much think televisions...

_____ A random sample of 1003 U.S. adults was asked “Do you pretty much think televisions are a necessity of a luxury you could do without?” OF the 1003 adults surveyed, 521 indicated that televisions are a luxury they could do without.

a) What are the observational units?

b) What is the variable? Is it binary/dichotomous?

c) Verify that the conditions of the confidence interval are met – that we have a representative sample, and that and .

d) Produce a 90% confidence interval estimate of the proportion of U.S. adults that indicate that televisions are a luxury they could do without. Interpret the interval.

e) Produce a 93% confidence interval estimate of the proportion of U.S. adults that indicate that televisions are a luxury they could do without. Just produce and interpret the interval using the TI-83.

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