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Questions and Answers
What is the purpose of using Z-scores?
What is the purpose of using Z-scores?
- To determine the range of the data set
- To enable comparison of scores when direct comparison of raw scores is impossible (correct)
- To convert categorical variables into numerical variables
- To calculate the mean of the data set
What does a positive Z-score indicate?
What does a positive Z-score indicate?
- The data value is equal to the mean
- The data value is below the mean
- The data value is an outlier
- The data value is above the mean (correct)
How is the Z-score calculated?
How is the Z-score calculated?
- z = (X + XÌ„) / S
- z = (X / XÌ„) * S
- z = (X * XÌ„) / S
- z = (X - XÌ„) / S (correct)
What is the value of Q1 in relation to the ordered data?
What is the value of Q1 in relation to the ordered data?
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What is the rank of Q3 in relation to the data?
What is the rank of Q3 in relation to the data?
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What is the relationship between Q1 and Q2?
What is the relationship between Q1 and Q2?
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