Solution: Finding Standard Deviation from a Frequency

Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola

Problem 40BSC Chapter 3.3

Elementary Statistics | 12th Edition

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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola

Elementary Statistics | 12th Edition

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Problem 40BSC

Problem  40BSC

Finding Standard Deviation from a Frequency Distribution. In Exercises,find the standard deviation of sample data summarized in a frequency distribution table by using the formula befaw, where x represents the class midpoint, f represents the class frequency, and n represents the total number ofsamph values. Aho, compare the computed standard deviations to these standard deviations obtained by using Formula 3-4 with the original list of data values: 9.7years.

Years President Lived after First Inauguration

Frequency

0–4

8

5–9

2

10–14

5

15–19

7

20–24

4

25–29

6

30–34

0

35–39

1

Step-by-Step Solution:
Step 1 of 2

Solution  40BSC

From the given information, the frequency distribution of years President lived after first inauguration is

Years President

Lived after first

Inauguration

Frequency

0 – 4

8

5 – 9

2

10 – 14

5

15 – 19

7

20 – 24

4

25 – 29

6

30 – 34

0

35 – 39

1

Step 2 of 2

Chapter 3.3, Problem 40BSC is Solved
Textbook: Elementary Statistics
Edition: 12th
Author: Mario F. Triola
ISBN: 9780321836960

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