Question

Mercedes is conducting a study about the costs of prom dresses. Her school has 2500 students. She asks 10 of the girls in her AP statistics class to participate in a survey. She bases her findings on these results. Is this a valid study? Why or why not?

A) NO, she should ask the girls in her chorus class instead
B) YES, asking 10 girls in her class will give her a good sample to work with.
C) YES, drawing a sample only from AP statistics gives a random sample of girls attending prom at the school.
D) NO, drawing a sample only from AP statistics does not give a random sample of girls attending prom at the school.

Answer 1

Answer: D) NO, drawing a sample only from AP statistics does not give a random sample of girls attending prom at the school.

Explanation:

Given: Mercedes is conducting a study about the costs of prom dresses.

The total students in her school = 2500

She asks 10 of the girls in her AP statistics class to participate in a survey.

Since 10 is a too smaller number than 2500 which means sample taken by her for survey is very small and it can be biased.

Therefore, D is the right answer .

Answer 2

NO, drawing a sample only from AP statistics does not give a random sample of girls attending prom at the school.