Chapter 3 - Central Tendency

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+ a) 7+ b) 4 c) 2 d) Cannot be determined

B) 4

What is the median for these data? 5, 1, 1, 3, 2 a) 2 b) cannot be calculated c) 1 d) 2.4

a) 2

What is the mode for these data? 3, 1, 2, 5+, 2, 4 a) 2 b) 2.5 c) Cannot be calculated d) 6

a) 2

What is the median for these data? 3, 1, 2, 5+, 2, 4 a) 2.5 b) 6 c) 3 d) cannot be calculated

a) 2.5

For which levels of measurement can you calculate the mode? a) Both ordinal and interval b) Ordinal only c) Neither ordinal nor interval d) Interval only

a) Both ordinal and interval

What is the highest level of measurement? a) Ratio b) Ordinal c) Interval d) Nominal

a) Ratio

Which measure of central tendency is MOST influenced by outliers? a) mean b) median c) mode d) all are the same

a) mean

What is the minimum level of measurement needed to calculate the median? a) ordinal b) interval c) ratio d) nominal

a) ordinal

Which measure of central tendency is most appropriate for skewed distributions? a) No measure is appropriate b) Median c) Mean d) Mode

b) Median

Which of these measures is LEAST affected by outliers? a) mean b) median c) geometric mean d) standard deviation

b) Median

Which measure of central tendency works for nominal variables? a) Mean b) Mode c) No measures work for nominal variables d) Median

b) Mode

Which of these measures of central tendency works for nominal variables? a) Both the mean and the median work for nominal variables. b) Neither the mean nor the median works for nominal variables. c) The mean d) The median

b) Neither the mean nor the median works for nominal variables.

Which measure of central tendency is always influenced by outliers? a) The mode b)The mean c) They are all affected identically d) The median

b) The mean

Which of these measures is MOST affected by outliers? a) They are all affected identically b) The mean c) The mode d) The median

b) The mean

Which of the following measures of central tendency can be used with data on the ratio level of measurement? a) Neither the mean nor the mode b) The mean or the mode c) The mean only d) The mode only

b) 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 _____. a) dichotomous b) bimodal c) unimodal d) symmetrical

b) bimodal

What is the minimum level of measurement needed to calculate the mean? a) ratio b) interval c) ordinal d) nominal

b) interval

In a negatively skewed distribution, which measure will generally have the highest value? a) all are the same b) mode c) mean d) median

b) mode

What is the minimum level of measurement needed to calculate the mode? a) ordinal b) nominal c) ratio d) interval

b) nominal

Which of the following is NOT a measure of central tendency? a) mean b) standard deviation c) median d) mode

b) standard deviation

When a histogram for a quantitative variable has only one distinct peak, then the distribution is referred to as... a) symmetrical. b) unimodal. c) ideal. d) normal.

b) unimodal

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+ a) Cannot be determined b) 7+ c) 2 d) 3

c) 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+ a) Cannot be determined b) 7+ c) 2 d) 4

c) 2

In a positively skewed distribution, which measure will generally have the highest value? a) all are the same b) median c) mean d) mode

c) mean

Which measure of central tendency is MOST affected by outliers? a) mode b) all are the same c) mean d) median

c) mean

The three most common measures of central tendency are: a) nominal, ordinal, ratio b) inferential, descriptive, explanatory c) mean, median, mode d) variance, standard deviation, IQR

c) mean, median, mode

What is the mean for these data? 3, 1, 2, 5, 3, 4 a) 6 b) 3.5 c) cannot be calculated d) 3

d) 3

What is the mean for these data? 4, 2, 3, 6, 4, 5 a) Cannot be calculated b) 5 c) 4.5 d) 4

d) 4

What is the mean for these data? 3, 1, 2, 5+, 2, 4 a) 6 b) 2.5 c) 3 d) cannot be calculated

d) cannot be calculated

Which measure of central tendency is LEAST efficient? a) all are the same b) median c) mean d) mode

d) mode