Author: Anonymous

 6. Distinguish between histograms and bar graphs. When do we use each? 

1.  Distinguish between descriptive and inferential statistics. In your answer, explain what each term means. 

BONUS (worth up to 5 points) Provide an example of  an experiment. Label your Hypothesis, IV, DV, control group, and experimental group. 

Organize the  scores below in a table showing simple frequency, cumulative frequency, and relative frequency.  After doing so, graph the data set choosing an appropriate technique.  Explain why you did not use the other graphical options.  16, 11,  13, 12, 11, 0,  16, 12, 16, 15, 16,  11, 13, 16, 12, 11

5. When do we use statistics? When do we use parameters? What kind of symbols are used for both? 

2.  Distinguish between a smple and a population. Which is more commonly used in research? Why? 

8. Suppose after this exam, I come into class and announce that the exam results were positively skewed. What conclusions would you draw about the data set of exam scores? 

Why are different scales of measure useful?  Discuss  the different types  we talked about in class, and provide an example for each of them.  In your answer, address the difference between continuous and discrete variables. 

10. In science we sometimes have to do score transformations. Why are they important/necessary? Provide an example. 

4. Distinguish between a positive and negative correlation. In your answer, provide an example of each.