6th Grade Math Textbook, Fundamentals

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Number of Books

Number of Books Read for Pleasure

8 9 10 11 12 13 14

Lesson 8-2 for exercise sets. &KDSWHU 

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Find the mean, median, mode, and range for each data set.

1.5.2, 8.4, 4.3, 6.7, 5.8 2.2, 13, 13,5,  7 3.8, 6, 6 , 8 , 7 , 7, 8, 5 , 7, 8

Solve.

4.Add a number to the following data set 5.Remove a number from the data set

that makes the median 17. so that the mode is 73.

15, 18, 20, 54, 62, 73, 78, 62, 81, 73, 60

6.In the first 7 years of his career, a baseball player had 190, 186, 182, 190,

200, 198, and 184 hits. For the mean, median, and mode to remain the same

after his 8th year, how many hits would he have to get in that year?

7.Discuss and Write Use the line plot in this lesson to explain how a line plot

shows the frequency of data.

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Think



15 points

game

total number of points

5 games

Remember:

mean number of data itemssum of data

You can use an equation to find a missing item in a data set.

In 4 games, Neala has scored 11, 18, 22, and 10 points.

To average 15 points per game, how many points does

she need to score in her next game?

Write and solve an equation.

Let npoints Neala needs to score in the 5th game.

 15 Use the definition of mean.

 15 Add the number values.

5 • 5 • 15 Multiply both sides by 5 to isolate the term containing n.

(61 n)  75

61 n 61  75  61 Subtract 61 from both sides to isolate n.

n 14

So Neala needs to score 14 points in her next game to average 15 points per game.

A is especially useful for showing

the mode and range of a set of data. A line

plot is a graph that displays data with X marks

above each data value on a number line.

This set of data is shown in the line plot at

the right.

2, 8, 8, 3, 7, 13, 5, 9, 8, 6, 4, 7, 2, 6, 5, 12, 10, 12,

8, 11, 9, 10, 8, 5, 7

The greatest number of Xs is above the 8, so the mode is 8.

The least number of books read is 2, and the greatest number is 13.

So the range is 13 2, or 11, books.

( 61 n)

5

61 n

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11  18  22  10 n

5

line plot