Statistics Chapter 1 Review

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

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

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

• mean

• median

• standard deviation

• IQR

• variance

Rachael gave a survey to her classmates to learn about their superstitions. Here's some of the data she collected: gender, age, birth month, whether or not they read horoscope (y/n).

Which of the following is the correct number of quantitative and categorical variables?

• 3 quantitative and 1 categorical

• 2 quantitative and 2 categorical

• 1 quantitative and 3 categorical

• 0 quantitative and 4 categorical

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?