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

Answer 1

Given claim: A coin favors heads when tossed, and there are 90 heads in 100 tosses.

Answer: There isn’t sufficient evidence to support this claim, because the coin is a fair coin.

 

Given claim: Movie patrons have IQ scores with a standard deviation that is less than the standard deviation of 15 for the general population. A simple random sample of 40 movie patrons result in IQ scores with a standard deviation of 14.8.

Answer: Claim is either true or false

 

In a rare event rule, we conclude that the assumption is probably not correct, if, under a given assumption, the probability of a particular observed event is exceptionally small.