Question

Use your graphing calculator to determine the necessary t value for a 95% confidence interval based on a sample size of 55 and sample standard deviation of 7.42.

HELP PLS!

Answer 1

The t-value is 2.0049.

Explanation:

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 55 - 1 = 54

Now, we have to find a value of T, which is found looking at the t table, with 54 degrees of freedom(y-axis) and a confidence level of 0.95(
`t_(95)`). So we have T = 2.0049

The t-value is 2.0049.