Chapter 3

Which of these measures of central tendency works for nominal variables?

Neither the mean nor the median works for nominal variables.

What is the median for these data? 5, 1, 1, 3, 2

2

What is the mode for the following data set? 1 2 2 2 2 2 3 3 3 3 4 4 4 5 5 5 5 6 6 7 7+

2

What is the mode for these data? 3, 1, 2, 5+, 2, 4

2

What is the median for these data? 3, 1, 2, 5+, 2, 4

2.5

What is the mean for these data? 3, 1, 2, 5, 3, 4

3

What is the mean for these data? 4, 2, 3, 6, 4, 5

4

What is the median for the following data set? 1 2 2 2 2 2 3 3 3 3 4 4 4 5 5 5 5 6 6 7 7+

4

For which levels of measurement can you calculate the mode?

Both ordinal and interval

Which measure of central tendency is always influenced by outliers?

The mean

Which of these measures is MOST affected by outliers?

The mean

Which of the following measures of central tendency can be used with data on the ratio level of measurement?

The mean or the mode

When a histogram or polygon chart for a quantitative variable has two distinct peaks, then the distribution is referred to as _____.

bimodal

What is the mean for these data? 3, 1, 2, 5+, 2, 4

cannot be calculated

What is the minimum level of measurement needed to calculate the mean?

interval

In a positively skewed distribution, which measure will generally have the highest value?

mean

Which measure of central tendency is MOST affected by outliers?

mean

Which measure of central tendency is MOST influenced by outliers?

mean

The three most common measures of central tendency are:

mean, median, mode

Which measure of central tendency is most appropriate for skewed distributions?

median

Which of these measures is LEAST affected by outliers?

median

In a negatively skewed distribution, which measure will generally have the highest value?

mode

Which measure of central tendency is LEAST efficient?

mode

Which measure of central tendency works for nominal variables?

mode

What is the minimum level of measurement needed to calculate the mode?

nominal

What is the minimum level of measurement needed to calculate the median?

ordinal

What is the highest level of measurement?

ratio

Which of the following is NOT a measure of central tendency?

standard deviation

When a histogram for a quantitative variable has only one distinct peak, then the distribution is referred to as...

unimodal