Statistics Chapter Review

What is the relationship between the standard deviation and the variance?

• The standard deviation is the square root of the variance

• The variance is the square root of the standard deviation

• The standard deviation is half the variance

• There is no relationship between the standard deviation and the variance

What is the best measure measure of center for symmetric data?

• mean

• median

• mode

What is the best measure of center for skewed data or data with outliers?

• mean

• median

• mode

Which of the following is a measure of spread?

• Standard deviation

• mean

• Quantitative

• statistic

Which of the following measures are resistant to extreme values? Choose all that apply.

• mean

• median

• standard deviation

• IQR

• variance

An iced coffee has 15 grams of sugar.

Estimate the percentile of this drink to nearest whole percent.

A set of data has a mean that is much smaller than the median. Which of the following statements is most consistent with this information?

• The distribution is symmetric

• The distribution is skewed left

• The distribution is skewed right

• The distribution is bimodal

• The data set probably has a few low outliers

The mean lifespan of household mice is 2.5 years. The sum of all ages of a group of household mice is 110 years. How many mice are in this group?

The variance of 80 values is 81. What is the standard deviation?

Which of the following is true about this modified box plot.

• The distribution is symmetric

• The distribution is left skewed

• The distribution is right skewed

• The distribution is uniform