We are testing a claim that the proportion of trumpet-players is 0.47 . We have

ID: 3375652 • Letter: W

Question

We are testing a claim that the proportion of trumpet-players is 0.47 .

We have written our question so that we can use the Binomial model to describe any resulting data (X = number of trumpet-players).

In order to be able to use a “Z-test” to analyze the experimental outcome, we should make sure that …

our sample consists only of trumpet-players.

the alpha value is less than the p-value.

our sample size is less than the actual population size.

our sample size is so large that we expect to find at least 5 trumpet-players and 5 non-trumpet-players.

our sample size is > 30.

In order to be able to use a “Z-test” to analyze the experimental outcome, we should make sure that …

our sample size is so large that we expect to find at least 5 trumpet-players and 5 non-trumpet-players.

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