Questions: Calculate the standard score of the given X value, X=49.3, where μ=48 and σ=43.8 and indicate on the curve where z will be located. Round the standard score to two decimal places.
Transcript text: Calculate the standard score of the given $X$ value, $X=49.3$, where $\mu=48$ and $\sigma=43.8$ and indicate on the curve where $z$ will be located. Round the standard score to two decimal places.
Solution
Solution Steps
Step 1: Identify the given values
The problem provides the following values:
\( X = 49.3 \)
\( \mu = 48 \)
\( \sigma = 43.8 \)
Step 2: Use the standard score formula
The standard score (z-score) formula is:
\[ z = \frac{X - \mu}{\sigma} \]
Step 3: Substitute the given values into the formula
Substitute \( X = 49.3 \), \( \mu = 48 \), and \( \sigma = 43.8 \) into the formula:
\[ z = \frac{49.3 - 48}{43.8} \]
Step 4: Calculate the z-score
Perform the calculation:
\[ z = \frac{1.3}{43.8} \approx 0.03 \]
Final Answer
The standard score (z-score) is approximately \( 0.03 \).