Make a decision about the given claim. Use only the rare eventrule, and make subjective estimates to determine whether events are likely. For example, if the claim is that a coin favors heads and sample results consist of 11 heads in 20 flips, conclude that there is not sufficient evidence to support the claim that the coin favors heads (because it is easy to get 11 heads in 20 flips by chance with a fair coin).

Claim: The mean

age

of students in a large

math

class is

greater

than

19

.

A simple random sample of the students has a mean

age

of

19.6

.

Choose the correct answer below.

A.

The sample

is

unusual if the claim is true. The sample

is

unusual if the claim is false. Therefore, there

is

sufficient evidence to support the claim.

B.

The sample

is not

unusual if the claim is true. The sample

is not

unusual if the claim is false. Therefore, there

is not

sufficient evidence to support the claim.

C.

The sample

is not

unusual if the claim is true. The sample

is not

unusual if the claim is false. Therefore, there

is

sufficient evidence to support the claim.

D.

The sample

is

unusual if the claim is true. The sample

is

unusual if the claim is false. Therefore, there

is not

sufficient evidence to support the claim.