Fundamentals of Math

Fundamentals of Mathematics

Important Message: If your dataset does not contain a mode do not write 0 when asked what the mode is. 0 is a number, and so it is possible the actual mode of a dataset is 0 (e.g., −1, −1,0,0, 0, 2 ). Therefore, if your dataset does not contain a mode, it is important that you spell out "No Mode" when asked what the mode is.

Example 7.3.3

7

10

6

9

9

2

6

5

9

6

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

Value

2

5

6

7

9

10

Tally Frequency

1

1

3

1

3

1

Before you begin your practice problems, be sure to pay close attention to what the question is asking you regarding the mode. Is the question asking you what is the mode or how many modes there are?

1

1

1

2

2

3

3

3

3

3

4

4

5

5

5

5

5

Q: What is the mode? A: 3 and 5

Q: How many modes are there? A: 2

Practice 7.3

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

1. 29, 3, 93, 60, 49, 83, 35, 72, 63, 14, 29, 51, 90

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

3. 72, 42, 68, 19, 35, 53, 61, 72, 26, 80, 24

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

Answer Key on Page 125

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