Statistics 9/25-29

Ch. 2 S3 RG

1. What is a frequency distribution chart?  How is it useful?  How can percentage comparisons be useful?
2. What is a frequency polygon or frequency curve?
3. What is a normal or bell shaped curve?
4. In looking at central tendency, what are the mode, median, and mean?  Find the mode, median and mean for the data from the following data: 12, 23, 25, 18, 17, 16, 15, 20, 21, 20, 13, 19, 22, 24, 11.
5. What is the range?  How do you figure out the range?  What was the range from the data on Tuesday?
6. What is the standard deviation?  What does it mean if the number for the standard deviation is big or small?
7. What is a correlation coefficient?
8. What is positive and negative correlation?
9. What is a scatterplot?  What are inferential statistics?
10. What makes something statistically significant?

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