Mean, Median, Mode, Range, & Box Plots

Box Plots

100

What is the median? 1, 3, 7, 9, 11, 13, 15

9

200

What is the lower quartile? 1, 3, 7, 9, 11, 13, 15

3

300

What is the Upper Quartile? 1, 3, 7, 9, 11, 13, 15

13

400

What is the IQR (Interquartile Range)? 1, 3, 7, 9, 11, 13, 15

10

500

Create a box blot. 1, 3, 7, 9, 11, 13, 15

Check box plot

Vocabulary

100

What is the definition of mode?

The number in a data set that appears the most.

200

What is the definition of median?

The number in the middle when the numbers are in order from least to greatest.

300

How do you find the mean?

Add all of the numbers in the data set together. Divide by the amount of numbers in the data set.

400

What is interquartile range?

The difference between quartile 3 and quartile 1 (the range of the box in the box plot).

500

How do you find the lower quartile?

By finding the median of the left side of the data.

Measure of Center

100

Median: 83 , 97 , 85 , 84 , 96 , 80 , 80 , 87 , 91 

85

200

Mean: 83 , 97 , 85 , 84 , 96 , 80 , 80 , 87 , 91 

87

300

Mode: 83 , 97 , 85 , 84 , 96 , 80 , 80 , 87 , 91 

80

400

Median: 79 , 70 , 71 , 60 , 60 

70

500

Mean: 30 , 36 , 47 , 50 , 50 , 50 

43.8

Dot Plots, Histograms, Bar Charts

100

In a bar chart, do the bars touch? 

No

200

What is along the horizontal axis for a histogram?

intervals of numbers

300

Create a dot plot for the data 2,4,6,2,5,2,1,5,5,5,3

Check

400

See Histogram: What is the mode of the data? 

15-19

500

See Histogram: how many ages are covered by each interval? 

5

Spiral Review

100

Solve: 2x - 2.5 = 52.3

x = 27.4

200

Combine like terms:

2x - 3 + 5 ( -2x - 2) 

-8x - 13

300

What is absolute value?

A numbers distance from zero.

400

I have 7 CD's with 91 songs on them.
What is the rate of songs per CD?

13 songs per CD.

500

What is 22% of 124?

27.28