A certain test preparation course is designed to help students improve their scores on the GRE exam. A mock exam is given at the beginning and end of the course to determine the effectiveness of the course. The following measurements are the net change in 3 students' scores on the exam after completing the course: 23, 17, 19 Using these data, construct a 80 % confidence interval for the average net change in a student's score after completing the course. Assume the population is approximately normal. Copy Data Step 3 of 4: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

To the left of z= -1.32

Thank you! Does this mean that the plate is 0.35 units from the bottom of the bowl, as the question asks?

You are hiking in the mountains. answer to three decimal places. For every 100.00 feet you would be walking horizontally, you have increased your elevation by 3.2 feet. At what grade are you climbing? Give your Hint: Your units will be in ft/ft.