T Distribution.docx - Construct a 93% confidence interval...

Construct a 93% confidence interval for a sampling distribution that has a mean of 150,
a standard deviation of 20, and a size of 16.
141.25–158.77
7–93%
140.25–159.75
139.34–160.66
As the confidence level increases for the same sampling distribution, the confidence
interval __________.
In which of the following is T distribution used? Construct a 93% confidence interval for a sampling distribution that has means of {4, 4,
4, 4.2, 4.2, 4.3, 4.3, 4.3, 4.4, 4.4, 4.4, 4.4, 4.5, 4.5, 4.6, 4.7, 4.7, 4.7, 4.8, 4.8, 4.8, 4.9,
4.9, 4.9, 4.9}.
As the confidence interval increases for the same sampling distribution, the value of the
critical value __________.
fluctuates between larger and smaller
remains the same
increases
decreases in size

Construct a 95% confidence interval for a sampling distribution that has means of {4, 4,
4, 4.2, 4.2, 4.3, 4.3, 4.3, 4.4, 4.4, 4.4, 4.4, 4.5, 4.5, 4.6, 4.7, 4.7, 4.7, 4.8, 4.8, 4.8, 4.9,