$$\text { Find } t _ { \alpha / 2 } \text { when } n = 12 \text { for the } 95 \% \text { confidence interval for the mean. }$$
A) 2.20
B) 1.52
C) 1.80
D) 2.92

Question

Quizplus · Accepted Answer

The correct value for $t_{\alpha/2}$ when $n = 12$ for a 95% confidence interval can be found in the t-distribution table. For a 95% confidence interval and $n = 12$, the degrees of freedom ($df$) is $n - 1 = 11$. Looking up the value in the t-table for 11 degrees of freedom for a two-tailed test (which corresponds to the 95% confidence interval), the closest value is 2.20.

Find tα/2 when n=12 for the 95% confidence interval for the mean. \text { Find } t _ { \alpha / 2 } \text { when } n = 12 \text { for the } 95 \% \text { confidence interval for the mean. } Find tα/2​ when n=12 for the 95% confidence interval for the mean.

$\text { Find } t _ { \alpha / 2 } \text { when } n = 12 \text { for the } 95 \% \text { confidence interval for the mean. }$