SOLUTION: Suppose that I construct a confidence interval for the mean test grade on exam 1 using Statcrunch and get Upper Limit, 68.9 and a lower limit 76.3. State the conclusion for the co

Question 1162197: Suppose that I construct a confidence interval for the mean test grade on exam 1 using Statcrunch and get Upper Limit, 68.9 and a lower limit 76.3. State the conclusion for the confidence interval
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

You didn't mention the confidence level. This bit of information is important for any confidence interval. However, when textbooks do not state a confidence level, the default is often assumed to be 95% (corresponding to a level of significance of alpha = 0.05). I'll assume your textbook is implying a 95% confidence interval. Replace "95%" with whatever percentage value you are given, if necessary.

Also, I think you meant to say "lower limit = 68.9 and upper limit = 76.3". If the opposite, then it honestly makes no sense since 68.9 is smaller than 76.3

If the confidence level is 95%, then you could say that you are 95% confident the population mean of exam scores is between 68.9 and 76.3; which signifies that if you generated 100 confidence intervals, then about 95 of them should contain the population mean.

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