Renee wants to estimate the percentage of people who lease a car. She surveys 140 individuals and finds that 115 lease a car. What is the sample proportion for successes, ^ p ? Round the final answer to three decimal places. Provide your answer below:

A biologist wants to estimate proportion of humans who have a certain gene. He wants to be 95% confident that the true proportion is within 5% of the sample proportion. What should his sample size be? Select one: а. 385 b. More information is required. C. 1537 d. 384 e. 96

A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes which are defective. Step 1 of 2: Suppose a sample of 5431 floppy disks is drawn. Of these disks, 4943 were not defective. Using the data, estimate the proportion of disks which are defective. Enter your answer as a fraction or a decimal number rounded to three decimal places. E Tables E Keypad