Q. A) Suppose we randomly poll 500 Americans and ask them whether they believe that the parents are involved. What is the distribution of the sample mean?
B) What is the probability that the sample average will be within four percentage points of the population mean?
C) How would the answer to part B) change if we polled 1,000 people?
D) Give an intuitive explanation for why your answer to part b) differs from that in part c).
E) Suppose that of the 1000 people sampled in part c), 548 believe that Madeline's parents were involved in her disappearance. What is the point estimate of the true population mean? How likely are we going to see 548 or more people believeinir involvement?
F) Suppose a newspaper claims that 60% or more of the population believesin parents' involvement. What's the most appropriate hypothesis test to show that they are wrong?
G) Using the sample observation in part e), perform the hypoth.