Answer:
23.08 < µ < 36.9
Step-by-step explanation:
First we need to find the sample mean and standard deviation.
Sample mean: Add up the values and divide by the total amount of values...
(26.2 + 17.8 + 23.1 + 36.0 + 31.1 + 43.2 + 36.4 + 26.1)/8 = 239.9/8 = 29.99
The sample standard deviation is calculated on the first attached photo
s = 8.27
The confidence interval is constructed in the second attached photo