Concept explainers
(a)
To find: the percent of days it actually rain.
(a)
Answer to Problem 29E
9.3%
Explanation of Solution
Given:
Rain | No rain | |
Rain | 27 | 63 |
No rain | 7 | 268 |
Calculation:
Total number of days rained is 34. Total number of days is 365.
Therefore, the percent of day it actually rain is
Therefore, the percent of actually rained days is 9.3%.
(b)
To find: the percent of days was rain predicted.
(b)
Answer to Problem 29E
24.7%
Explanation of Solution
Given:
Rain | No rain | |
Rain | 27 | 63 |
No rain | 7 | 268 |
Calculation:
Total numbers of days were rain predicted is 90.
And total number of days is 365.
Therefore, the percent of days was rain predicted is
Therefore, the percent of rain predicted days is 24.7%
(c)
To find: the percent of the time was the forecast correct.
(c)
Answer to Problem 29E
80.8%
Explanation of Solution
Given:
Rain | No rain | |
Rain | 27 | 63 |
No rain | 7 | 268 |
Calculation:
The rain forecast is correct = 27 times and
No rain forecast is correct =268 times.
Total correct forecast is 27+268=295.
Total number of days is 365.
Therefore, the percent of the time was the forecast correct is
Therefore, the required percent correct forecast is 80.8%.
(d)
To Explain: the about the accurate prediction of the weather forecast and briefly explanation with appropriate graph.
(d)
Explanation of Solution
Given:
Rain | No rain | |
Rain | 27 | 63 |
No rain | 7 | 268 |
Graph:
Chapter 3 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
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