Concept explainers
(a)
To find: the number of red lights should researcher predict to hit every day.
(a)
Answer to Problem 16E
2
Explanation of Solution
Given:
Formula used:
Calculation:
Expected number of red lights hit every day
Researcher can expect about 2.25= 2 lights to hit every day
(b)
To Calculate: the standard deviation.
(b)
Answer to Problem 16E
1.26
Explanation of Solution
Given:
Formula used:
Calculation:
0 | 0.05 | -2.25 | 5.0625 | 0.253125 |
1 | 0.25 | -1.25 | 1.5625 | 0.390625 |
2 | 0.35 | -0.25 | 0.0625 | 0.021875 |
3 | 0.15 | 0.75 | 0.5625 | 0.084375 |
4 | 0.15 | 1.75 | 3.0625 | 0.459375 |
5 | 0.05 | 2.75 | 7.5625 | 0.378125 |
1.5875 |
The variance is,
Standard deviation is
Therefore, the standard deviation is 1.26
Chapter 16 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
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Elementary Statistics Using Excel (6th Edition)
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