1. A simple random sample of size n equals n=250 individuals who are currently employed is asked if they work at home at least once per week. Of the 250 employed individuals surveyed, 30 responded that they did work at home at least once per week. Construct a 99% confidence interval for the population proportion of employed individuals who work at home at least once per week.

What is the lower bound is ?

2. A television sports commentator wants to estimate the proportion of citizens who "follow professional football." Complete parts (a) through (c).

(a) What sample size should be obtained if he wants to be within 4 percentage points with 96% confidence if he uses an estimate of 52% obtained from a poll?

What is the sample size ?