A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at the beginning and end of determine the effectiveness of the course. The following measurements are the net change in 5 students' scores on the exam after completing the cours 20, 26, 20, 11, 19 Using these data, construct a 90 % confidence interval for the average net change in a student's score after completing the course. Assume the populatio approximately normal. Step 3 of 4: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places. Answer H Tables How to enter your answer (opens in new window) Keybc Previous Submi © 2021 Hawkes Learning

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A certain test preparation course is designed to help students improve their scores on the LSAT 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 5 students' scores on the exam after completing the course:

20, 26, 20, 11, 19

Using these data, construct a 90% confidence interval for the average net change in a student's score after completing the course. Assume the population is approximately normal.

**Step 3 of 4:** Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

**Answer:**

[Text box for the answer]

---

This activity is related to calculating a confidence interval, which is a range of values that is used to estimate a population parameter. The critical value is crucial in determining the width of this interval, which in turn impacts the precision of your estimation.

*Note: The page includes a section for entering the answer and submitting it, but no graphs or diagrams are present.*
Transcribed Image Text:A certain test preparation course is designed to help students improve their scores on the LSAT 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 5 students' scores on the exam after completing the course: 20, 26, 20, 11, 19 Using these data, construct a 90% confidence interval for the average net change in a student's score after completing the course. Assume the population is approximately normal. **Step 3 of 4:** Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places. **Answer:** [Text box for the answer] --- This activity is related to calculating a confidence interval, which is a range of values that is used to estimate a population parameter. The critical value is crucial in determining the width of this interval, which in turn impacts the precision of your estimation. *Note: The page includes a section for entering the answer and submitting it, but no graphs or diagrams are present.*
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