# Question what is the degree of freedom in a t

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Question What is the degree of freedom in a T distribution? The same as the sample size Always zero
One less than the sample size One more than the sample size Correct answer One less than the sample size Question Construct a 90% confidence interval for a sampling distribution that has a mean of 150, a standard deviation of 20, and a size of 16.
Correct answer 141.23–158.77 Question Construct a 95% confidence interval for a sampling distribution that has a mean of 150, a standard deviation of 20, and a size of 16.
Correct answer 139.34-160.66 Question 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.
Question What is a characteristic of the t -test? Applied for large samples, that is, when n > 30 Follows a T distribution Always uses a normal distribution and applied when standard deviation is known Is preferred when standard deviations are known Correct answer Follows a T distribution
Question As the confidence level increases for the same sampling distribution, the confidence interval __________.