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.