3. A recent study of 100 people in Miami found that 27 were obese. a) Find the point estimate. b) Verify that the requirements for constructing a confidence interval for p are satisfied. c) Construct a 90% confidence interval of the population proportion of individuals in Miami who are obese.

4. A study found that the average time it took a person to find a new job was 5.9 months. If a sample of 36 job seekers was surveyed, construct the 99% confidence interval of the mean of all job seekers to find a new job. Assume the standard deviation is 0.8 months.

5. A survey of 80 recent fatal accidents showed that 46 were alcohol related. a) Find the point estimate. b) Verify that the requirements for constructing a confidence interval for p are satisfied. c) Construct a 99% confidence interval of the proportion of all fatal alcohol-related accidents.

6. My husband Tim, an avid golfer, claims that his average drive is greater than 250 yards. To prove this, he measured 9 drives from a round of golf. Here are this distances, in yards. 262 247 255 239 275 257 260 242 248 Construct an 80% confidence interval for the mean length of all of Tim's drives.