Question

# Find t_{\frac{\alpha}{2}},\ n=15 for the 98\% confidence interval for the mean.

Confidence intervals
Find $$\displaystyle{t}_{{{\frac{{\alpha}}{{{2}}}}}},\ {n}={15}$$ for the $$\displaystyle{98}\%$$ confidence interval for the mean.

2021-08-06
Step 1
Provided information that,
$$\displaystyle{n}={15}$$
Alpha $$\displaystyle{\left(\alpha\right)}={1}-{0.98}={0.02}$$
$$\displaystyle{\frac{{\alpha}}{{{2}}}}={0.01}$$
Step 2
t Critical value:
$$\displaystyle{t}_{{{0.01},\ {n}-{1}}}={2.1447}$$