A poll asked 1,000 adults, "If purchasing a used car made certain upgrades or features more affordable, what would be your preferred luxury upgrade?" The results indicated that 9% of males and 14% of females answered window tinting.

The poll description did not state the sample sizes of males and females. Suppose that both samples were 500 and that 44 of 500 males and 70 of 500 females reported window tinting as their preferred luxury upgrade of choice. Answer parts (a) through (c) below.

a. Construct a 95% confidence interval estimate of the population proportion of males who said that window tinting would be their favorite upgrade.

.0632 .1128-Correct Answer

(Round to four decimal places as needed.)

b. Construct a 95% confidence interval estimate of the population proportion of females who said that window tinting would be their favorite upgrade.

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(Round to four decimal places as needed.)