The t value for a 99% confidence interval estimation based upon a sample of size 10 is
A)1.645.
B)1.812.
C)2.576.
D)3.169.

Question

Quizplus · Accepted Answer

The t value for a 99% confidence interval with a sample size of 10 (which means 9 degrees of freedom) is closest to 3.169. This is because the t-distribution, which accounts for the additional uncertainty in estimating the population standard deviation from a small sample, requires a higher value than the z-distribution for the same confidence level, especially with fewer degrees of freedom (smaller sample sizes). The exact value can vary slightly depending on the source of the t-table, but 3.169 is a commonly accepted value for 9 degrees of freedom at the 99% confidence level.

The T Value for a 99% Confidence Interval Estimation Based