A sample of 50 homes in a subdivision revealed that 24 were ranch style (as opposed to colonial, tri-level, or Cape Cod). (a) Construct a 95 percent confidence interval for the true proportion of ranch style homes. (b) Check the normality assumption of p. 8.37 In a grocery parking lot, 32 of 136 cars selected at random were white.
(a) Construct a 99 percent confidence interval for the true proportion of white cars.
(b) May normality of p be assumed? Explain.