STATISTICAL TECHNIQUES AND TOOLS
T DISTRIBUTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
A 95% confidence interval for the mean grade is (13.8, 25.2). What is the point estimate for the mean grade of the mid-term?
|
|
14.1
|
|
|
25.2
|
|
|
19.5
|
|
|
14.5
|
|
|
23.6
|
Explanation:
Detailed explanation-1: -The critical z-score values when using a 95 percent confidence level are-1.96 and +1.96 standard deviations. The uncorrected p-value associated with a 95 percent confidence level is 0.05.
Detailed explanation-2: -For part 1, we know that our point estimate is 8 and our margin of error is 5, so our confidence interval should be 8 minus 5 at the lower end, which would be 3, then 8 plus 5 at the upper end.
There is 1 question to complete.