You are learning how to make cookies, but you never seem to arrange the right portion of sugar to make a perfect one. So, you note how much sugar you use every time to find the right portion.

Let's say the amount of sugar for your last ten experiment goes like 100, 52, 54, 67, 73, 86, 40, 102, 88, and 90. Suppose you want to estimate the average amount of sugar. You would like a 90% confidence interval. (HINT: Since n < 30, and is unknown, use the t distribution.)

Please use excel to solve the problem