1. a. Describe the basic characteristics of a normal distribution and the normal curve.
   

b. A test measuring basic literacy skills in children is normally distributed, with µ = 20 and σ = 7. Calculate the z score for each of the following test scores:

• X = 10
• X = 16
• X = 22
• X = 35

c. Identify the area under the normal curve for the following people (use the information above to calculate the z scores and look up the areas in Table V in the Sullivan text):

• test score between 18 and 28
• test score lower than 25
• test score greater than 30
• test score between 10 and 15

d. What is the usefulness of transforming raw scores to z scores, and for identifying the area under the normal curve? What do these numbers tell us?

e. If you had a data set entered into SPSS and wanted to obtain z scores for one of your variables, what steps would you take to obtain these z scores directly in this software program?

2.Go to www.ablongman.com/george9e and click on the "Data
Sets" link at the top of the page. Download the divorce-studentversion.sav file . You will need to open the file in SPSS to complete this assignment.

(Note: Only focus on the locus and lsatisy variables for this assignment. Both locus of control and life satisfaction are measured via psychological tests assuming equal intervals and greater numbers representing more of that variable.)

A. In the body of your post include the following:
1. List the variables and explain their scale of measurement (nominal, ordinal, interval, or ratio).

2. What is the mean, median, mode, range, standard deviation, and variance for locus and lsatisy?

3. What are the 95% confidence intervals for the means of locus and lsatisy? Explain what these mean.

4. Describe at least 2 examples of when you would utilize confidence intervals. Explain why these statistics would be useful to analyze.

B. Attach the output file to your post:
1. Obtain the frequencies, central tendency, and variability measures for locus and lsatisy.
2. Obtain the confidence intervals for each mean.
3. Clean up the output file created and then save it as a spv file to your computer.

Price: $15.85

Solution: The downloadable solution consists of 8 pages, 785 words and 4 charts.
Deliverable: Word Document