Make a decision about the given claim. Use only the rare event rule, and make su

Question

Make a decision about the given claim. Use only the rare event rule, 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 IQ scoreIQ score of students in a large mathmath class is lessless than 129. A simple random sample of the students has a mean IQ scoreIQ score of 128.7.

Explanation / Answer

We reject the claim as 128.7 is close to 129

Hence mean is not less than 129 and using subjective decision we do reject the claim

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