Based on a sample of 75 people, the sample mean GPA was 3.42 with a standard deviation of 0.04 The test statistic is: |(to 2 decimals) The critical value is: (to 2 decimals) Based on this we: Fail to reject the null hypothesis Reject the null hypothesis
Based on a sample of 75 people, the sample mean GPA was 3.42 with a standard deviation of 0.04 The test statistic is: |(to 2 decimals) The critical value is: (to 2 decimals) Based on this we: Fail to reject the null hypothesis Reject the null hypothesis
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Keep getting test statistics and critical value wrong

Transcribed Image Text:**Test the Claim**
**Objective:**
Test the claim that the mean GPA of night students is larger than 3.4 at the 0.10 significance level.
**Hypotheses:**
The null and alternative hypotheses would be:
1. \( H_0: \mu = 3.4 \) and \( H_1: \mu \neq 3.4 \)
2. \( H_0: \mu = 3.4 \) and \( H_1: \mu < 3.4 \)
3. \( H_0: p = 0.85 \) and \( H_1: p < 0.85 \)
4. \( H_0: p = 0.85 \) and \( H_1: p \neq 0.85 \)
5. \( H_0: \mu = 3.4 \) and \( H_1: \mu > 3.4 \) ✔
6. \( H_0: p = 0.85 \) and \( H_1: p > 0.85 \)
**Test Type:**
The test is:
- Two-tailed
- Left-tailed
- Right-tailed ✔
Note: The correct hypotheses for this test are \( H_0: \mu = 3.4 \) and \( H_1: \mu > 3.4 \), and the test is a right-tailed test.

Transcribed Image Text:### Statistical Analysis of Sample GPA
**Sample Size and Statistics:**
- **Sample Size:** 75 people
- **Sample Mean GPA:** 3.42
- **Standard Deviation:** 0.04
**Statistical Hypothesis Testing:**
1. **Test Statistic Calculation:**
- You will calculate the test statistic to two decimal places.
2. **Critical Value Determination:**
- Determine the critical value, also to two decimal places.
3. **Hypothesis Decision:**
- Based on the analysis, you should decide whether to:
- Fail to reject the null hypothesis
- Reject the null hypothesis
- In this scenario, the conclusion was to "Reject the null hypothesis."
This process involves determining whether the sample provides sufficient evidence to support a claim about the population mean, based on the calculated test statistic and critical value.
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