ALGEBRA 2
Name:_________________________________ Date:_____________
Vocabulary:
Mean: The ___________________ of a set of numbers
Median: The _________________________ when the data values are placed in order from _____________ to ______________
Mode: The number (or numbers) that occur ______________ frequently
Minimum: The __________________ number in a set of data
Maximum: The __________________ number in a set of data
Range: The __________________ between the __________________ and the __________________
Lower Quartile: The ____________________________ of the _____________ half of data values when data is in order
Upper Quartile: The ____________________________ of the _____________ half of data values when data is in order
Interquartile Range (IQR): The __________________ between the _____________________________ and the
_____________________________
Examples: Find the mean, median, mode, maximum, minimum, range, lower quartile, upper quartile, and IQR of the
following sets of data.
1) 8, 7, 6, 7, 6, 4, 7
Mean: ________
Median: ________
Mode: ________
Max: ________
Range: ________
LQ: ________
UQ: ________
IQR: ________
Mean: ________
Median: ________
Mode: ________
Max: ________
Range: ________
LQ: ________
UQ: ________
IQR: ________
Min: ________
2) 5, 8, 3, 1, 10, 9, 7, 6
Min: ________
3) 10, 12, 18, 20, 12, 18, 11, 12, 14, 18
Mean: ________
Median: ________
Mode: ________
Max: ________
Range: ________
LQ: ________
UQ: ________
IQR: ________
Min: ________
Stem and Leaf Plot:
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A display where the data is organized by place value
The "stem" is the left-hand column which contains the tens digits.
The "leaves" are the lists in the right-hand column, showing all the ones digits.
Create a stem and leaf plot for the following list of grades on a recent test. Then find the mean, median, and mode.
4) 73, 42, 67, 78, 99, 100, 84, 91, 82, 86, 94, 100
Box and Whisker Plot:
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A graphical display of the maximum, minimum, lower quartile, upper quartile, and median.
The “box” encloses the middle half of the data.
The “whiskers” extend to the minimum and maximum values.
The median divides the data set in half.
Use the following box and whisker plot to answer the questions.
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5) What is the median of the data?
7)
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15
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6) What is the UQ? The LQ? The interquartile range?
What percent of the data lies between the lower quartile and the upper quartile?
8) What percent of the data lies between the minimum and the lower quartile?
Create a box and whiskers plot for the following set of data:
9) 21, 10, 20, 15, 17, 18
10) 31, 33, 33, 35, 36, 39, 40, 41, 41
Homework: Text page 49-51
For each of the following, find the: mean, median, mode, range, minimum, maximum,
lower quartile, upper quartile, interquartile range, and draw a box and whisker plot.
Make a stem and leaf plot of math teacher salaries (in thousands of dollars).
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50
70
102
70
68
64
83
95
60
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