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WorksheetsQuartiles
Total questions: 30
Worksheet time: 33mins
Quartiles are …
the values that divide a list of numbers into quarters.
the values that divide a list of numbers into halves.
the values that divide a list of numbers into tens.
Quartiles measure variability around median of the data.
True
False
The first step to find quartiles:
Cut the list into four equal parts.
Put the list of numbers in order.
Find the quartiles, which are at the "cuts"
The second step to find quartiles:
Cut the list into four equal parts.
Put the list of numbers in order.
Find the quartiles, which are at the "cuts"
The third step to find quartiles:
Cut the list into four equal parts.
Put the list of numbers in order.
Find the quartiles, which are at the "cuts"
If the "cut" is between two numbers ...
the Quartile is the number on the left.
the Quartile is the number on the right.
the Quartile is the average of the two numbers.
What is another name for the “lower quartile?”
Q1
Q2
Q3
Median
What are other names for the “middle quartile?”
Q1
Q2
Q3
Median
What is another name for the “upper quartile?”
Q1
Q2
Q3
Median
How do you find Interquartile Range (IQR) ?
Find the average of the quartiles
Find the lowest quartile
Subtract Quartile 1 from Quartile 3
Find the median of these numbers:
2, 3, 4, 5, 5, 5, 7,
(a)
Find the Quartile 1 of these numbers:
2, 3, 4, 5, 5, 5, 7,
(a)
Find the Quartile 3 of these numbers:
2, 3, 4, 5, 5, 5, 7,
(a)
Find the median.
25, 9, 5, 18, 12, 22, 5
(a)
Find the Quartile 1.
25, 9, 5, 18, 12, 22, 5
(a)
Find the Quartile 3.
25, 9, 5, 18, 12, 22, 5
(a)
What is the lower Quartile (Q1) of the set of data:
4, 2, 7, 6, 6, 10, 8
(a)
What is the upper quartile (Q3) of the set of data:
4, 2, 7, 6, 6, 10, 8
(a)
Find the lower quartile of the following set of scores.
12, 9, 4, 6, 5, 8, 9, 4, 10, 2
(a)
The table shows the average monthly temperature for St. Louis. The median for this data is (a) .
The table shows the average monthly temperature for St. Louis. The lower quartile (Q1) for this data is (a) .
The table shows the average monthly temperature for St. Louis. The upp er quartile (Q3) for this data is (a) .
The table shows the average monthly temperature for St. Louis. You have already found the lower and upper quartiles. The Interquartile Range (IQR) is (a) .
This list shows the different precipitation amounts in 13 western US states. The median of this list is (a) .
This list shows the different precipitation amounts in 13 western US states. The lower quartile (Q1) of this list is (a) .
Write your answer as a decimal.
This list shows the different precipitation amounts in 13 western US states. The upper quartile (Q3) of this list is (a) .
This list shows the different precipitation amounts in 13 western US states. The Interquartile Range (IQR) of this data is (a) . Write your answer as a decimal.
Find the range of the data.
63, 71, 65, 66, 87, 53
(a)
Find the range of the data.
16, 28, 6, 19, 21, 15, 22, 33, 17
(a)
What is the range of this data set?
(a)
