test 1 study guide

# test 1 study guide - 1. What is a nominal scale? 2. What is...

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1. What is a nominal scale? 2. What is an ordinal scale? 3. What is an interval scale? 4. What feature distinguishes a ratio scale from an interval scale? 5. What is a population? 6. What is a sample? 7. What do we call descriptive characteristics of a population? 8. What do we call descriptive characteristics of a sample? 9. Define "Central Tendency" 10. Define mean. 11. Define mode. 12. Define median. 13. What is the only measure of central tendency that can be used for a nominal scale? 14. What types of central tendency can be used for an ordinal scale? 15. For which types of scales can the mean be used? 16. What does bimodal mean? 17. In a positively skewed distribution, which is higher, the mean or the median? 18. What is the best measure of central tendency for a skewed distribution? 19. Why is the mean a poor measure of central tendency for a skewed distribution? 20. If many samples are selected at random from the same population, which measure of central tendency is likely to be the most stable from sample to sample? 21. If many samples are selected at random from the same population, which measure of central tendency is likely to be the least stable from sample to sample? 22. Define variability. 23. Define outlier. 24. Name 3 reasons why measures of variability are important. 25. Define range 26. Name 2 disadvantages of using the range as a measure of variability.

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27. Define variance. 28. Why is the formula for variance different depending on whether the distribution is a population or a
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## This note was uploaded on 04/09/2008 for the course BIO 101 taught by Professor Takchung during the Spring '08 term at Illinois State.

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test 1 study guide - 1. What is a nominal scale? 2. What is...

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