Question

6. How many randomly selected adults must be surveyed to estimate the percentage of adults in ( point) the country who now use the Internet? Assume that you want to be 99% confident that the sample percentage is within 2 percentage points of the true population percentage and that you know nothing about the percentage of adults using the Internet. 16,577 O 4,145 O 2,401 O 613 (l point 7-A recent poll of 1800 people showed that 35% believe gas prices will go down. Find the best point estimate of the proportion of all people who believe gas prices will go down. 0 35 O 0.30 O 0.65 0.35 8. Find the critical value za2 corresponding to a 99.5% confidence level. a point) 0.0025 2.81 O 1.96 2.575 apomo Given n-875 and p-045, find the margin of error E that corresponds to a 95% confidence

Answer 1

Solution: