Quiz 2 Review

Which of the following are the three measures of spread?

• Mean, Range, and Mode

• Mean, Median, and Standard Deviation

• Mode, Median, and Mean

• Median, IQR, and Standard Deviation

• IQR, Range, and Standard Deviation

Which of the following are the three measures of center?

• Mean, Range, and Mode

• Mean, Median, and Standard Deviation

• Mode, Median, and Mean

• Median, IQR, and Standard Deviation

• IQR, Range, and Standard Deviation

What measure of center is best when outliers are present?

• Mean

• Median

• Mode

• Range

What measure of spread is non-resistant to outliers/extreme values?

• Standard Deviation

• IQR

The median is at the ___ percentile.

• 0th

• 25th

• 50th

• 75th

• 100th

If the standard deviation of 10 values is 5, then the variance is

If the variance of 50 values is 49, then the standard deviation is

In a recent survey, a sample of high school students were asked what their gender was (male or female). You classify 1 as “male” and 2 as “female”. The data is below, arranged in order.

1 1 1 1 1 1 1 1 2 2 2

What is the median of the data set?

• 1

• 2

• 1.27

• It does not make sense to find the median since this is categorical data.

A group of teenagers were asked when they had their first job. The ages are listed below:

16 12 12 17 13 16 19 18 14

The range of the teenagers ages is

A group of teenagers were asked when they had their first job. The ages are listed below:

16 12 12 17 13 16 19 18 14

What is the median age of these students?