Question 1120534
This is a paired t with df=59, xbar 7, and s=4
The 90% CI is the mean +/- t 0.95, df=59, *s/sqrt(n)
the interval width is 1.67*4/sqrt(60)=0.86
The 90%CI is (6.14, 7.86)
We don't know the exact value for garlic's lowering cholesterol, but we are 90% confident that the true interval is between 6.14 and 7.86. It's not a probability, because the parameter is either in the interval or outside it.