Question

​A scientist asked four of her dentist friends if they thought the new Brand X sugar-free gum that she developed was effective.Three responded​ "yes." The scientist used the results to write a TV advertisement claiming that ​"3 out of 4 dentists prefer Brand X sugar-free gum​." Is this a valid​ inference? Explain.

Use pencil and paper. Explain all of the factors that are necessary for an inference to be valid.

Is the inference​ valid? Explain. Choose the correct answer below.

A.​Yes, because 3 dentists said yes out of 4 who were asked.

B.No, because 3 dentists said yes out of 7 who were asked.

C.No, because the dentists asked are not a representative sample of the population of dentists.

D.​Yes, because the dentists asked are a representative sample of the population of dentists.


​

Answer 1

the answer is c

Explanation:

while four dentists were asked, and three recommended it, those 4 do not speak for the thousands of dentists out there, with a larger pool it may be proven, but the 4 dentists do not speak on behalf of all dentists.