Question

Hi, can you help me answer this question please, thank you!

Answer 1

We are given the size of the sample:

`n=17`

To find the critical t value, we will need to find "df"--> the degrees of freedom. This is defined as the size of the sample minus 1:

`\begin{gathered} df=n-1 \\ df=17-1 \\ df=16 \end{gathered}`

Now, we need to look in a t-table the point where df=16 and the confidence level is 80%. We can see this in the following image:

The t critical value is:

`t=1.337`

Answer:

`t=1.337`