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Measures of Central Tendency
Pot Luck
Box Plots
Dot Plots and Histograms
Mean and Median
100

What are the two measures of central tendency we discussed in class?

Mean and Median

100
Find the range of this data set: 17, 47, 26, 2, 31, 19
45
100
What are the five values need to make a box-and-whisker plot?
Minimum, 1st quartile, median, 3rd quartile, maximum
100

True or False. You only use your data values on the number line for a dot plot.

False.
100
This is the mode of the following book costs: 5, 5, 9, 49, 11, and 5
What is 5?
200
Find the mean rounded to the nearest tenth: 17, 26, 37, 22, 30, 19, 21
24.6
200
Find the interquartile range of this data set: 87, 81, 92, 77, 97, 84
12
200
What are the minimum and maximum values of the data set: 78, 12, 109, 36, 121
12 and 121
200

How can you tell how many data values there are by looking only at a dot plot?

You can count the dots.
200

Which measure of central tendency can be found by adding all the data values together and then dividing the sum by the total number of data values?

The mean.

300
Find the median: 197, 56, 203, 79, 145, 2
112
300

What is the measure of spread of a numerical data set that is the difference between the greatest and least values in a data set?

The range.

300
What is the median of the data set: 72, 90, 84, 76, 68
76
300

What do the numbers represent on a histogram on the vertical axis?

The frequencies.

300

Fine the mean of the data set of the number of books these five people own: 37, 50, 53, 17, 10, 49

36.

400
What value of x makes this data set have a mean of 6: 10, 6, 12, 3, x
5
400

What is the range of each data set: 30, 27, 24, 30, 32, 31?

8.

400
What are the 1st and 3rd Quartiles of the data set: 19, 22, 15, 20, 12
13.5 and 21
400

Which data set gives you specific information about each data point?

Dot plots

400

Your classmate describes the data below by using a measure of center, 21.5 for the data set below. What is the measure?

25, 4, 78, 18, 7, 63

The median?

500
Create a data set that has 5 values, has a mean of 12, a median of 13 and a mode of 13 and 14.
6, 13, 13, 14, 14
500
Find the standard deviation of the data set: 63, 59, 70, 68
4.3
500
Find the minimum, 1st quartile, median, 3rd quartile, and maximum: 27, 22, 25, 27, 23, 28
22, 23, 26, 27, 28
500

What type of data works best for a histogram?

Large data sets and decimal values.

500

Find the median of the data set. 137, ?-150, 55, 17, -?101, 179

36.