Elementary Statistics: A Step By Step Approach
10th Edition
ISBN: 9781259755330
Author: Allan G. Bluman
Publisher: McGraw-Hill Education
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Chapter 3.2, Problem 22E
Reaction Times In a study of reaction times to a specific stimulus, a psychologist recorded these data (in seconds). Find the variance and standard deviation for the data.
| Class limits | Frequency |
| 2.1–2.7 | 12 |
| 2.8–3.4 | 13 |
| 3.5–4.1 | 7 |
| 4.2–4.8 | 5 |
| 4.9–5.5 | 2 |
| 5.6–6.2 | 1 |
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Chapter 3 Solutions
Elementary Statistics: A Step By Step Approach
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