HW 12, Q 4 g&h

ben

It's asking for a 92% confidence interval, but I can't find that on the t-table. How to I find the t score for a specific confidence level like 92?

mark

If you need to find a $t^*$ multiplier for a confidence level that's not on our table, you'll need to use some software. You could use a command like the following:

from scipy.stats import t
print(t.ppf(0.92,10))

# Out: 1.517897992387647

Keep in mind that this will depend on the degrees of freedom, as well as the confidence level. Also, that command yields a one sided area and corresponds to a picture that looks like so:

You probably want a two sided computation for a confidence interval and need to make the appropriate change.

If you don't have Python with SciPy handy, you can always do it online like so:
https://sagecell.sagemath.org/?q=chbcel