Box Plots
What is the median? 1, 3, 7, 9, 11, 13, 15
9
What is the definition of mode?
The number in a data set that appears the most.
Median: 83 , 97 , 85 , 84 , 96 , 80 , 80 , 87 , 91
85
Make a dot plot for the following data set.
2, 3, 2, 5 , 10, 9, 7, 10, 7, 9, 15, 8
Check dot plots.
Solve: 2x - 2.5 = 52.3
x = 27.4
What is the lower quartile? 1, 3, 7, 9, 11, 13, 15
3
What is the definition of median?
The number in the middle when the numbers are in order from least to greatest.
Mean: 83 , 97 , 85 , 84 , 96 , 80 , 80 , 87 , 91
87
Make a histogram and frequency table for the following set of data.
10, 12, 15, 15, 19, 23, 25, 26, 29, 30, 31,32
Combine like terms:
2x - 3 + 5 ( -2x - 2)
-8x - 13
What is the Upper Quartile? 1, 3, 7, 9, 11, 13, 15
13
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.
Mode: 83 , 97 , 85 , 84 , 96 , 80 , 80 , 87 , 91
80
What measure of center can you find with a dot plot?
Mean, Median, Mode
What is absolute value?
A numbers distance from zero.
What is the IQR (Interquartile Range)? 1, 3, 7, 9, 11, 13, 15
10
What is interquartile range?
The difference between quartile 3 and quartile 1 (the range of the box in the box plot).
Median: 79 , 70 , 71 , 60 , 60
70
How can you use a histogram?
Answers will vary.
I have 7 CD's with 91 songs on them.
What is the rate of songs per CD?
13 songs per CD.
Create a box blot. 1, 3, 7, 9, 11, 13, 15
Check box plot
How do you find the lower quartile?
By finding the median of the left side of the data.
Mean: 30 , 36 , 47 , 50 , 50 , 50
43.8
How can you identify outliers in a dot plot?
The outlier stands out either on the far left or right in the dot plot.
What is 22% of 124?
27.28