(a)
To find: the number of bull's-eyes that are supposed to get.
(a)
Answer to Problem 20E
4.8
Explanation of Solution
Given:
Formula used:
Calculation:
Suppose X is the number of bulls eyes researcher get.
Expected number is,
It could be expected that here to get 4.8 bulls eyes.
(b)
To Calculate: the standard deviation.
(b)
Answer to Problem 20E
0.98
Explanation of Solution
Given:
Formula used:
Calculation:
Standard deviation is,
(c)
To find: the if keep shooting arrows till the researcher hits the bull's-eye, how long it will take.
(c)
Answer to Problem 20E
1.25
Explanation of Solution
Given:
Formula used:
Calculation:
Expected number of arrow researcher should shoot is,
Therefore, it could be expected that to shoot 1.25 arrow before researcher gets first bull eye.
Chapter 17 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
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