1) Consider the following descriptive statistics:M =24.69 (SD =58.55). How confident can we be that the mean is an accurate representation of the values in the data set?

• A.Not very confident, because the standard deviation is smaller than the mean
• B.Not very confident, because the standard deviation is much larger than the mean
• C.Extremely confident, because the standard deviation is much larger than the mean
• D.Extremely confident, because the standard deviationis close to zero

2) Ricky has a data set that is negatively skewed. What does this mean?

• A. The mode is located to the right of the mean with the tail of the distribution trailing off to the lower end of the distribution
• B. The mode is located to the left of the mean with the tail of the distribution trailing off to the higher end of the distribution
• C. The mode is located to the right of the mean with the tail of the distribution trailing off to the higher end of the distribution
• D. The mode is located to the left of the mean with the tail of the distribution trailing off to the lower end of the distribution

3) Felicity collected data on exam scores in her statistics class. The skewness coefficient for her data is -4.33(SE = 0.23). What does this value suggest?

• A. There may be a ceiling effect for exam performance
• B. There may be a floor effect for exam performance
• C. The distribution is leptokurtic
• D. The distribution is mesokurtic