Question

based on survey results, the proportion of u.s. adults who own at least one apple product (iphone, ipad, macbook, etc) is 0.42. this point estimate would be unbiased and most accurate if the survey were based on which of the following? a. a random sample of 1,000 u.s. adults b. a random sample of 1,800 u.s. adults c. a random sample of 2,500 u.s. college students d. an internet survey posted on techguru.com with 3,100 responses

Explanation:

For an unbiased and accurate point - estimate of the proportion of U.S. adults who own at least one Apple product, the sample should be a random sample of the target population (U.S. adults) and the larger the sample size, the more accurate the estimate. Option C is a sample of college students which is not the entire U.S. adult population. Option D is an internet survey on a tech - related website which may attract a biased sample of tech - interested individuals. Between Option A and B, a larger sample size (1,800) in Option B will generally give a more accurate estimate compared to a sample size of 1,000 in Option A.

Answer:

B. A random sample of 1,800 U.S. adults