Multiple Choice
You measure the lifetime of a random sample of 25 rats that are exposed to 10 Sv of radiation (the equivalent of 1000 REM) , for which the LD100 is 14 days. The sample mean is x̄= 13.8 days. Suppose that the lifetimes for this level of exposure follow a Normal distribution, with unknown mean μ and standard deviation σ= 0.75 day. What is the 95% confidence interval for μ based on these data?
A) 13.45 to 14.15
B) 13.51 to 14.09
C) 13.55 to 14.05
D) 13.74 to 13.86
Correct Answer:
Verified
Correct Answer:
Verified
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