Simplify number 64. i am a little confused.

Because 9 has a whole number square root, simplify that first to get 3/root 5.
We don't want roots in the denominator so multiply the fraction by root 5/root 5 which is equal to 1.
The final answer is: 3 root 5/5

The correct value is t* = 2.797.

Step-by-step 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 = 25 - 1 = 24

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 24 degrees of freedom(y-axis) and a  two-tailed confidence level of . So we have T = 2.797.