Q:

Based on survey results, the mean amount of credit card debt for U.S. adults under 35 is $8,724. This point estimate would be unbiased and most accurate if the survey were based on which of the following? A. O A random sample of 1,500 U.S. adults under 35 B. O A random sample of 2,800 U.S. adults under 35 C. O A random sample of 3,000 U.S. college students D. O A national television news station poll with 3,500 responses

Accepted Solution

A:
Answer:Step-by-step explanation:Given that for X the amount of credit card debt for U.S. adults under 35, ishaving mean as 8724 dollars.  For this point estimate to be unbiased and most accurate we must ensure thati) The sample represents the populationii) Samples are drawn at randomiii) Sample sizes are sufficienly large.Hence we see that C is not right as college students cannot represent the entire population.  Tv poll cannot be said to be random since there may be a significant population who was not aware about this poll.  A and B are right but B is better with more sample size.