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
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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.
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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