From a list of stock mutual funds, 52 funds were selected at random. Of the funds chosen,

Question:

From a list of stock mutual funds, 52 funds were selected at random. Of the funds chosen, it was found that 19 required a minimum initial investment under $1,000.
(a) Construct a 90 percent confidence interval for the true proportion requiring an initial investment under $1,000.
(b) May normality of p be assumed? Explain.