Question
View Policies Current Attempt in Progress Find the \( z \)-score of the value 96 in a dataset with mean 73 and standard deviation 10 . Interpret the \( z \)-score in terms of number of standard deviations above or below the mean. Give your answers accurate to three decimal places. \( z \)-score \( = \) i This value of 96 is \( \mathbf{i} \)
Ask by Colon Edwards. in the United States
Jan 22,2025
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Answer
The \( z \)-score of 96 is **2.300**, which means it is **2.300 standard deviations above** the mean.
Solution
To find the \( z \)-score of the value 96 in a dataset with a mean (\( \mu \)) of 73 and a standard deviation (\( \sigma \)) of 10, you can use the following formula:
\[
z = \frac{X - \mu}{\sigma}
\]
Where:
- \( X \) is the value in question (96),
- \( \mu \) is the mean (73),
- \( \sigma \) is the standard deviation (10).
Plugging in the values:
\[
z = \frac{96 - 73}{10} = \frac{23}{10} = 2.300
\]
**Interpretation:**
A \( z \)-score of **2.300** means that the value 96 is **2.300 standard deviations above** the mean of the dataset.
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**Final Answer:**
\( z \)-score \( = \) **2.300**
This value of 96 is **2.300 standard deviations above** the mean.
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The Deep Dive
To find the \( z \)-score, you can use the formula: \[ z = \frac{(X - \mu)}{\sigma} \] where \( X \) is the value in question (96), \( \mu \) is the mean (73), and \( \sigma \) is the standard deviation (10). Plugging in the values: \[ z = \frac{(96 - 73)}{10} = \frac{23}{10} = 2.3 \] So, the \( z \)-score \( = 2.300 \). This value of 96 is \( \mathbf{2.300} \) standard deviations above the mean, indicating that it is significantly higher than the average value in the dataset.