The t value for a 95% confidence interval estimation with 24 degrees of freedom
(not the sample size n) is

a. 1.317836
b. 1.710882
c. 2.063899
d. 2.492159
e. 2.796939

c. 2.063899

Step-by-step explanation:

Assuming a confidence interval bilateral.

For this case the confidence is 95% so then the significance level is:

And

The degrees of freedom are given

So then we need to find a quantile on the t distribution with 24 degrees of freedom that accumulates 0.025 of the area on each tail, and we can use the following excel code:

"=T.INV(1-0.025,24)"

Or equivalently "=T.INV.2T(0.05,24)"

And we got

So the best option is:

c. 2.063899

16 is the absolute value

step-by-step explanation: