Determine the point estimate of the population mean and margin of error for the confidence interval with lower bound 14 and upper bound: 26.
Determine the point estimate of the population mean and margin of error for the confidence interval with lower bound 14 and upper bound: 26.
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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![**Provide an appropriate response.**
**Determine the point estimate of the population mean and margin of error for the confidence interval with lower bound 14 and upper bound: 26.**
1. \( \overline{x} = 20, E = 12 \)
2. \( \overline{x} = 26, E = 6 \)
3. \( \overline{x} = 20, E = 6 \)
4. \( \overline{x} = 14, E = 12 \)
Explanation:
Given the confidence interval [14, 26], we want to determine the point estimate (sample mean \( \overline{x} \)) and the margin of error (E).
The point estimate \( \overline{x} \) is the midpoint of the confidence interval, which can be found using the formula:
\[ \overline{x} = \frac{\text{Lower bound} + \text{Upper bound}}{2} \]
\[ \overline{x} = \frac{14 + 26}{2} = \frac{40}{2} = 20 \]
The margin of error \( E \) is the distance from the point estimate to either end of the interval:
\[ E = \text{Upper bound} - \overline{x} \]
\[ E = 26 - 20 = 6 \]
So, the correct answer is:
\[ \overline{x} = 20, E = 6 \]
Thus, the correct answer choice is 3:
\[ \overline{x} = 20, E = 6 \]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5730e8ce-04cb-40ac-bc31-580b9f61da3d%2F9e505fee-c200-47ca-a74c-d0a296ed8a79%2F9rz7h9n_processed.png&w=3840&q=75)
Transcribed Image Text:**Provide an appropriate response.**
**Determine the point estimate of the population mean and margin of error for the confidence interval with lower bound 14 and upper bound: 26.**
1. \( \overline{x} = 20, E = 12 \)
2. \( \overline{x} = 26, E = 6 \)
3. \( \overline{x} = 20, E = 6 \)
4. \( \overline{x} = 14, E = 12 \)
Explanation:
Given the confidence interval [14, 26], we want to determine the point estimate (sample mean \( \overline{x} \)) and the margin of error (E).
The point estimate \( \overline{x} \) is the midpoint of the confidence interval, which can be found using the formula:
\[ \overline{x} = \frac{\text{Lower bound} + \text{Upper bound}}{2} \]
\[ \overline{x} = \frac{14 + 26}{2} = \frac{40}{2} = 20 \]
The margin of error \( E \) is the distance from the point estimate to either end of the interval:
\[ E = \text{Upper bound} - \overline{x} \]
\[ E = 26 - 20 = 6 \]
So, the correct answer is:
\[ \overline{x} = 20, E = 6 \]
Thus, the correct answer choice is 3:
\[ \overline{x} = 20, E = 6 \]
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