MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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**Contingency Tables and Conditional Probability: Homework and Passing a Course**

A teacher categorized students by whether they regularly completed their homework (or not) and whether they passed the course (or not). The data are in the table below.

|                                   | Completed HW | Did not Complete HW | Total |
|-----------------------------------|--------------|----------------------|-------|
| **Passed the Course**             | 27           | 8                    | 35    |
| **Did not Pass the Course**       | 6            | 16                   | 22    |
| **Total**                         | 33           | 24                   | 57    |

---

A student from the class is randomly selected. Determine the following probabilities. Enter your results as percents rounded to two decimal places.

**What is the probability a student completed the HW?**

**__________ %**

**What is the probability a student passed the course and did not complete the HW?**

**__________ %**

**What is the probability a student did not pass the course or completed the HW?**

**__________ %**

**What is the probability a student passed the course given that they completed the HW?**

**__________ %**

---

*Explanation of the table:*
1. **Rows**: Indicating whether students passed the course or did not pass the course.
2. **Columns**: Indicating whether students completed their homework or did not complete their homework.
3. **Totals**: The sums of students in each category are provided in the margins of the table.
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Transcribed Image Text:**Contingency Tables and Conditional Probability: Homework and Passing a Course** A teacher categorized students by whether they regularly completed their homework (or not) and whether they passed the course (or not). The data are in the table below. | | Completed HW | Did not Complete HW | Total | |-----------------------------------|--------------|----------------------|-------| | **Passed the Course** | 27 | 8 | 35 | | **Did not Pass the Course** | 6 | 16 | 22 | | **Total** | 33 | 24 | 57 | --- A student from the class is randomly selected. Determine the following probabilities. Enter your results as percents rounded to two decimal places. **What is the probability a student completed the HW?** **__________ %** **What is the probability a student passed the course and did not complete the HW?** **__________ %** **What is the probability a student did not pass the course or completed the HW?** **__________ %** **What is the probability a student passed the course given that they completed the HW?** **__________ %** --- *Explanation of the table:* 1. **Rows**: Indicating whether students passed the course or did not pass the course. 2. **Columns**: Indicating whether students completed their homework or did not complete their homework. 3. **Totals**: The sums of students in each category are provided in the margins of the table.
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