Fundamentals of Math

Fundamentals of Mathematics

Practice 7.2

Directions: Find the mean of each of the following datasets.

1. 51, 28, 19, 70, 36, 21, 51, 40, 63

2. 92, 63, 22, 80, 63, 71, 45, 351

3. 24, 31, 12, 38, 12, 15

4. 93, 46, 72, 58, 85, 32

Answer Key on Page 125

7.3 Mode The final measure of central tendency we are going to study is the mode. The mode is the value that appears the most often in the dataset. It's not always the greatest measure of central tendency because if no values repeat themselves, then no mode exists. In that instance you would say "No Mode" if asked to identify the mode of a dataset with no mode. On the other hand, if multiple values repeat themselves the same amount, then the dataset would contain multiple modes, thus not giving you the best idea of the central value.

Example 7.3.1

6

3

9

5

10

5

5

2

6

2

Step 1: Tally the number of times each value occurs to get its frequency.

Value

2

3

5

6

9

10

Tally Frequency

2

1

3

2

1

1

The mode is 5.

Example 7.3.2

3

2

10

1

8

9

4

5

7

6

Step 1: Tally the number of times each value occurs to get its frequency.

Value

1

2

3

4

5

6

7

8

9

10

Tally Frequency

1

1

1

1

1

1

1

1

1

1

There is no mode.

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