For a population with u =70 and o= 8, what is the z-score cor %3D corresponding to X= 82?
For a population with u =70 and o= 8, what is the z-score cor %3D corresponding to X= 82?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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![**Problem Statement for Educational Purposes:**
For a population with a mean (μ) of 70 and a standard deviation (σ) of 8, what is the z-score corresponding to X = 82?
**Explanation:**
To find the z-score, use the formula:
\[
z = \frac{(X - μ)}{σ}
\]
where:
- \( X \) is the value for which you're calculating the z-score (82 in this case),
- \( μ \) is the mean of the population (70),
- \( σ \) is the standard deviation of the population (8).
Plug in the values:
\[
z = \frac{(82 - 70)}{8}
\]
\[
z = \frac{12}{8}
\]
\[
z = 1.5
\]
Thus, the z-score corresponding to \( X = 82 \) is 1.5. This indicates that 82 is 1.5 standard deviations above the mean.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F396cda7c-782c-4cc6-8ef0-da5ec17c422f%2F430ccf7c-2f47-4144-9b4e-16f4cf10e0a7%2Fhcjk2hsf_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Problem Statement for Educational Purposes:**
For a population with a mean (μ) of 70 and a standard deviation (σ) of 8, what is the z-score corresponding to X = 82?
**Explanation:**
To find the z-score, use the formula:
\[
z = \frac{(X - μ)}{σ}
\]
where:
- \( X \) is the value for which you're calculating the z-score (82 in this case),
- \( μ \) is the mean of the population (70),
- \( σ \) is the standard deviation of the population (8).
Plug in the values:
\[
z = \frac{(82 - 70)}{8}
\]
\[
z = \frac{12}{8}
\]
\[
z = 1.5
\]
Thus, the z-score corresponding to \( X = 82 \) is 1.5. This indicates that 82 is 1.5 standard deviations above the mean.
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