You wish to test the following claim (Ha) at a significance level of a = 0.10. H,:µ = 89.2 HaiH > 89.2 You believe the population is normally distributed and you know the standard deviation is a = 10.7 .You obtain a sample mean of M = 93.4 for a sample of size n = 23. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic - What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is. O less than (or equal to) a O greater than a This test statistic leads to a decision to. O reject the null O accept the null O fail to reject the null As such, the final conclusion is that. O There is sufficient evidence to warrant rejection of the claim that the population mean is greater than 89.2. O There is not sufficient evidence to warrant rejection of the claim that the population mean is greater than 89.2. O The sample data support the claim that the population mean is greater than 89.2. O There is not sufficient sample evidence to support the claim that the population mean is greater than 89.2.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
icon
Concept explainers
Question
**Hypothesis Testing at Significance Level 0.10**

**Claim (Hₐ):**
\( H_0: \mu = 89.2 \\
H_a: \mu > 89.2 \)

**Given Data:**
- Population is normally distributed.
- Standard deviation \( \sigma = 10.7 \).
- Sample mean \( \bar{X} = 93.4 \).
- Sample size \( n = 23 \).

**Tasks:**

1. **Calculate the Test Statistic:**
   - Use the formula for the test statistic for a one-sample z-test:
     \[
     z = \frac{\bar{X} - \mu}{\sigma/\sqrt{n}}
     \]
   - Substitute the given values:
     \[
     z = \frac{93.4 - 89.2}{10.7/\sqrt{23}}
     \]
   - Compute the value and report the test statistic accurate to three decimal places.

2. **Determine the p-value:**
   - Based on the calculated z-value, find the corresponding p-value from the standard normal distribution.
   - Report the p-value accurate to four decimal places.

3. **Compare p-value with α:**
   - The p-value is either less than (or equal to) α or greater than α.

4. **Choose the Statistical Decision:**
   - Depending on the comparison of the p-value with α, decide to either reject the null hypothesis, accept the null hypothesis, or fail to reject the null hypothesis.

**Conclusion:**
- Make the final conclusion about the population mean based on the decision:
  - If you reject the null hypothesis, there is sufficient evidence to support that the population mean is greater than 89.2.
  - If you fail to reject the null hypothesis, there is not sufficient evidence to support that the population mean is greater than 89.2.

**Conclusion Options:**
- There is sufficient evidence to warrant rejection of the claim that the population mean is greater than 89.2.
- There is not sufficient evidence to warrant rejection of the claim that the population mean is greater than 89.2.
- The sample data support the claim that the population mean is greater than 89.2.
- There is not sufficient sample evidence to support the claim that the population mean is greater than 89.2.
Transcribed Image Text:**Hypothesis Testing at Significance Level 0.10** **Claim (Hₐ):** \( H_0: \mu = 89.2 \\ H_a: \mu > 89.2 \) **Given Data:** - Population is normally distributed. - Standard deviation \( \sigma = 10.7 \). - Sample mean \( \bar{X} = 93.4 \). - Sample size \( n = 23 \). **Tasks:** 1. **Calculate the Test Statistic:** - Use the formula for the test statistic for a one-sample z-test: \[ z = \frac{\bar{X} - \mu}{\sigma/\sqrt{n}} \] - Substitute the given values: \[ z = \frac{93.4 - 89.2}{10.7/\sqrt{23}} \] - Compute the value and report the test statistic accurate to three decimal places. 2. **Determine the p-value:** - Based on the calculated z-value, find the corresponding p-value from the standard normal distribution. - Report the p-value accurate to four decimal places. 3. **Compare p-value with α:** - The p-value is either less than (or equal to) α or greater than α. 4. **Choose the Statistical Decision:** - Depending on the comparison of the p-value with α, decide to either reject the null hypothesis, accept the null hypothesis, or fail to reject the null hypothesis. **Conclusion:** - Make the final conclusion about the population mean based on the decision: - If you reject the null hypothesis, there is sufficient evidence to support that the population mean is greater than 89.2. - If you fail to reject the null hypothesis, there is not sufficient evidence to support that the population mean is greater than 89.2. **Conclusion Options:** - There is sufficient evidence to warrant rejection of the claim that the population mean is greater than 89.2. - There is not sufficient evidence to warrant rejection of the claim that the population mean is greater than 89.2. - The sample data support the claim that the population mean is greater than 89.2. - There is not sufficient sample evidence to support the claim that the population mean is greater than 89.2.
Expert Solution
steps

Step by step

Solved in 7 steps with 4 images

Blurred answer
Knowledge Booster
Continuous Probability Distribution
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman