SUNY College at Buffalo Sociology 301 (Social Statistics)
Homework #5: To be due at the beginning of Chapter 6
Dr. ZHANG Jie

Submit your work on a Word file with the homework #, your name, and the date on top of it. You do not have to copy the questions, but the number of the question has to appear before your answer to each of them. The highest possible score for this homework is 10.

Essay Question 1:

Think and discuss the commonalities and differences between mathematics and statistics.

Essay Question 2:

What does a z-score indicate?  Why is it useful to transform a raw score into a z-score?

Essay Question 3:

What is the formula to get a z-score?  What is the formula to get a raw score if z, s, and mean are known?

Essay Question 4:

In a normal distribution, the mean is 100, the s is 8,
What is the z-score for a raw score of 108?  What is the percentage of scores that are above this raw score?
What is the z-score for a raw score of 99?  What is the percentage of scores that are below this raw score?
What is the z-score for a raw score of 79?  What is the percentage of scores that are above this raw score?

Computer Assignment:

Selective item (You do not have to do it to earn a full score for this homework assignment): Find the way in a SPSS program to locate z-scores.