Again consider the survey of 350 Bank of America customers discussed in Exercise 7.31. and assume that 48% of Bank of America customers would currently express customer delight. That is. assume p = .48. Find:
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).