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Consider the following. At most 60% of Americans vote in presidential elections.

ID: 3255105 • Letter: C

Question

Consider the following.

At most 60% of Americans vote in presidential elections.

State the Type I and Type II errors in complete sentences.

Type I error: We believe that at most 60% of Americans vote in presidential elections when it is really more than 60%. 
Type II error: We believe that more than 60% of Americans vote in presidential elections when it is really at most 60%. Type I error: We believe that more than 60% of Americans vote in presidential elections when it is really at most 60%. 
Type II error: We believe that at most 60% of Americans vote in presidential elections when it is really more than 60%.      Type I error: We believe that less than 60% of Americans vote in presidential elections when it really equals 60%. 
Type II error: We believe that 60% of Americans vote in presidential elections when it is really less than 60%. Type I error: We believe that 60% of Americans vote in presidential elections when it is really less than 60%. 
Type II error: We believe that less than 60% of Americans vote in presidential elections when it really equals 60%.

Explanation / Answer

Here H0: p <= 0.60

Ha : p > 0.60

Type I error rejecting the null hypothesis when it is true.

so Type I error is We believe that more than 60% of Americans vote in presidential elections when it is really at most 60%.

Type II error is accepting the null hypothesis when it is false.

so Type II error is we believe that at most 60% of Americans vote in presidential elections when it is really more than 60%.