Based on your results in Exercise 7.32, would it be reasonable to state that the survey's "margin of error" is ± 3 percentage points? ± 6 percentage points? Explain.
a. The probability that the sample proportion obtained from the sample of 350 Bank of America customers would be within three percentage points of the population proportion. That is. find P(A5 < p < .51).
b. The probability that the sample proportion obtained from the sample of 350 Bank of America customers would be within six percentage points of the population proportion. That is. find P(.42 < p < .54).