Math Problem Statement

Round each z-score to the nearest hundredth.

A data set has a mean of x = 71 and a standard deviation of 10.1. Find the z-score for each of the following.

Solution

To calculate the z-score for each value, you use the z-score formula:

z=xμσz = \frac{{x - \mu}}{{\sigma}}

where:

  • xx is the value in the data set,
  • μ\mu is the mean of the data set,
  • σ\sigma is the standard deviation of the data set.

Given:

  • Mean (μ\mu) = 71
  • Standard deviation (σ\sigma) = 10.1

Please provide the values for which you want to calculate the z-scores, and I can help you calculate and round them to the nearest hundredth.

Would you like to proceed with specific values?


Here are some questions you might explore after calculating z-scores:

  1. What does the z-score tell us about a data point's position in a normal distribution?
  2. How does a higher or lower z-score affect the interpretation of data points?
  3. How would you interpret a z-score of 0?
  4. What would a z-score of ±2.5 suggest about a data point's location relative to the mean?
  5. Can z-scores be used for comparing data sets with different means and standard deviations?

Tip: Z-scores standardize different data sets, making them comparable across different scales.

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Math Problem Analysis

Mathematical Concepts

Statistics
Z-scores
Standardization

Formulas

z = (x - μ) / σ

Theorems

Standard Normal Distribution

Suitable Grade Level

Grades 9-12