A random sample of 8 size AA batteries for toys yielded a mean lifespan of 3.65...
A random sample of 8 size AA batteries for toys yielded a mean lifespan of 3.65 hours with standard deviation, 0.76 hours. In a normal probability plot of battery lifespans, all of the points fell between the curved lines.
Find the margin of error for a 99% CI.
Homework Answers
Solution :
Given that,
t
/2,df = 3.499
Margin of error = E = t/2,df
* (s /
n)
= 3.499 * (0.76 /
8)
Margin of error = E = 0.94
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