0.25
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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Transcribed Image Text:### Understanding Confidence Intervals and Hypothesis Testing
**Concept:**
The three confidence intervals shown below represent three samplings. The objective is to decide whether each confidence interval indicates that you should reject the null hypothesis \( H_0 \). The null hypothesis in this case is \( H_0: p \leq 0.24 \).
### Graphs Explanation:
1. **Hypothesis Range Representation:**
- A horizontal bar indicates the value range where \( p \leq 0.24 \) (up to 0.24 on the scale).
2. **Confidence Interval Graphs:**
- **Interval (a):** The confidence interval (CI) ranges from \( 0.25 < p < 0.26 \).
- **Interval (b):** The confidence interval (CI) ranges from \( 0.21 < p < 0.23 \).
- **Interval (c):** The confidence interval (CI) ranges from \( 0.225 < p < 0.265 \).
### Questions and Answers:
#### (a) Choose the correct answer below:
- **A. Fail to reject \( H_0 \). The confidence interval includes values less than 0.24.**
- **B. Reject \( H_0 \). The confidence interval is located to the right of 0.24.**
- **C. Reject \( H_0 \). The confidence interval includes values less than 0.24.**
- **D. Fail to reject \( H_0 \). The confidence interval is located to the right of 0.24.**
#### (b) Choose the correct answer below:
- **A. Fail to reject \( H_0 \). The confidence interval includes values greater than 0.24.**
- **B. Fail to reject \( H_0 \). The confidence interval includes values less than 0.24.**
- **C. Reject \( H_0 \). The confidence interval includes values greater than 0.24.**
- **D. Reject \( H_0 \). The confidence interval includes values less than 0.24.**
### Explanation:
1. **Decision for Interval (a):**
- The interval \( 0.25 < p < 0.26 \) lies entirely to the right of 0.24.
- You should **reject \( H_0 \)** because the

Transcribed Image Text:## Understanding Confidence Intervals and Hypothesis Testing
The three confidence intervals displayed represent three distinct samplings. Your task is to determine whether each confidence interval suggests rejecting the null hypothesis \(H_0\). Please justify your reasoning.
### Hypothesis
\(H_0\): \(p \leq 0.24\)
### Graphical Representation
There are three intervals labeled (a), (b), and (c):
- **Interval (a)**: \(0.25 < p < 0.26\)
- **Interval (b)**: \(0.21 < p < 0.23\)
- **Interval (c)**: \(0.225 < p < 0.265\)
The intervals are marked on a continuous scale from 0.21 to 0.27.
**Choice Section**
#### (b) Choose the correct answer below for Interval (a):
- \( \circ \) **A.** Fail to reject \(H_0\). The confidence interval includes values greater than 0.24.
- \( \circ \) **B.** Fail to reject \(H_0\). The confidence interval includes values less than 0.24.
- \( \circ \) **C.** Reject \(H_0\). The confidence interval includes values greater than 0.24.
- \( \circ \) **D.** Reject \(H_0\). The confidence interval includes values less than 0.24.
#### (c) Choose the correct answer below for Intervals (b) & (c):
- \( \circ \) **A.** Reject \(H_0\). The confidence interval includes values less than 0.24.
- \( \circ \) **B.** Fail to reject \(H_0\). The confidence interval includes values less than 0.24.
- \( \circ \) **C.** Fail to reject \(H_0\). The confidence interval includes values greater than 0.24.
- \( \circ \) **D.** Reject \(H_0\). The confidence interval includes values greater than 0.24.
### Explanation
To determine whether to reject or fail to reject \(H_0\), observe where the intervals lie in relation to the null hypothesis boundary \(p = 0.24\):
1. **Interval (a)**: \(0.25 < p < 0.
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