Answer
The observed data for \[n=243\] values have been provided.
Work Step by Step
To obtain the 95% confidence interval, Minitab is used. Following procedure is followed to obtain the interval:
Step 1: In column C1 of Minitab worksheet, enter the data of “Number of Drinks”.
Step 2: Go to Stat > Basic Statistics > 1-Sample t.
Step 3: Click on Samples in columns and enter the variable C1 in the box provided.
Step 4: Substitute the value of Confidence level and Alternative with 95 and Not equal, respectively.
Step 5: Click Ok twice.
The lower and upper bounds of the interval are obtained as 1.8535 and 2.2452, respectively.
