1. For a sample with a mean of 150 and standard deviation 25, what is the lower limit of the 95% confidence interval?
A> 91.75
B> 101
C> 108.75
D> None of the above
1
Expert's answer
2020-03-17T12:36:08-0400
Marginal error can be calculated using =CONFIDENCE.NORM(0.05,25,1) excel formula which yields 48.9991. thus The lower limit of the 95% confidence interval is given by "150-48.99909961=101.0009004"
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