Unit 1, Lesson 5

Watch Your Calculations

Extra Support Materials for Algebra 1

5.1

Warm-up

Find the mean of each data set mentally.

40, 40, 40, 44
40, 40, 40, 36
40, 40, 40, 100
40, 40, 40, 0

5.2

Activity

<p>Two students reading while sitting</p>

The high school principal wants to know which tenth-grade students can be enrolled in an advanced literature course on the basis of their current reading scores. The reading scores are on a scale of 0–800, and a score of 490 is considered qualified for the advanced literature course. Here are the students’ scores:

row	column A	column B
1	Calculate the mean. 1, 1, 1, 2, 100	Calculate the mean. 20, 20, 20, 20, 25
2	Find the median. 9, 4, 10, 1, 6	Find the median. 6, 11, 12, 2, 4
3	Calculate the IQR. 13, 20, 12, 14, 19, 18, 11, 15, 16	Calculate the IQR. 2, 5, 8, 9, 1, 3, 10, 4, 6
4	Calculate the MAD. 1.75, 2.20, 2.50, 2.55, 2.75, 2.80, 3.00, 4.45	Calculate the MAD. 2.75, 3.20, 3.50, 3.55, 3.75, 3.80, 4.00, 5.45

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Watch Your Calculations

Warm-up

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