1..A random sample of 2000 Americans were asked whether they bought their significant other a present forValentine's Day. The99% confidence interval for estimating the proprtion of all Americans who bought a present is(0.456, 0.488). What does this suggest about Americans and ValentinesDay?

A.

Nothing can be inferred from the confidence interval.

B.

This suggests that the majority of Americans buy presents for their significant other forValentine's Day.

C.

This suggests that the majority of Americans do not buy presents for their significant other forValentine's Day.

D.

This suggests that there is a50-50 chance that a randomly selected American buys a present for their significant other forValentine's Day.

2..The accompanying histogram shows the distribution of mean ACT composite scores for all Wisconsin public schools in 2015.80.1% of the data points fall between one standard deviation below the mean and one standard deviation above the mean.

Give two reasons a Normal model is not appropriate for these data. Select all that apply.

A.

If a Normal model wereappropriate, about95% of the data points would fall within one standard deviation of the mean.

B.

The data are skewed left.

C.

If a Normal model wereappropriate, about68% of the data points would fall within one standard deviation of the mean.

D.

The data are skewed right.