A 95% confidence interval for p, the proportion of all shoppers at a large grocery store who purchase cookies, was found to be (0.236, 0.282). The point estimate and margin or error for this interval are:
(a) Point estimate = 0.236; Margin of error = 0.282
(b) Point estimate = 0.236; Margin or error = 0.046
(c) Point estimate unknown; Margin of error = 0.023
(d) Point estimate = 0.259; Margin or error = 0.046
(e) Point estimate = 0.259; Margin of error = 0.023