In: Statistics and Probability
_____ 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.