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gizmo_the_mogwai [7]
2 years ago
12

It is known from past information that the probability of failing to finish an Ironman (called a DNF) is 15%. Suppose we take a

sample of 100 Ironman races over the past few years and find that the DNF percentage is 12%. We are interested in seeing if there has been a significant decrease in the number of DNFs. Use alpha=0.05. Find the 95% confidence interval for the percentage of DNFs.
a. (0.0665, 0.1735)

b. (0.0555, 0.1845)

c. (0.1179, 0.1221)

d. (0.0563, 0.1837)
Business
1 answer:
Kamila [148]2 years ago
8 0
The answer is D I think
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