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Part 1 : Use the IQ variable, choose 10 scores, in the Howell Excel Data Set and transform the x values into z-scores using the
Part 1:
Use the IQ variable, choose 10 scores, in the Howell Excel Data Set and transform the x values into z-scores using the = 90 with = 17. Then put all information in a table using the "Create a Table" in the Learning Resources.
You need to compare the IQ, the same 10 scores, to the national average of = 100 with = 15 for the students in the math class. Add another column to your chart, using the "Create a Table" in the Learning Resources.
Part 2:
- Explain the reasons why transforming x values into z-scores is useful by using the example of the problem you solved in Part 1. Your explanation should include:
- Why knowing the z-scores for IQ helps you to understand the standard normal distribution of these scores for the math class.
- How z-scores can help researchers use the data from a sample to make inferences about a population.
- How converting the IQ scores (x-score) to the more familiar metric IQ scores (z-scores) in the second column can be helpful for the students in the math class.
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