Statistics Test Review

1. StatisticsTest Review VOCABULARY Topic 5: Measures of Spread

2. Channel Setting Instructions for ResponseCard RF1. Press and release the "GO" or "CH" button.2. While the light is flashing red and green, enter the 2 digit channel code (i.e. channel 1 = 01, channel 21 = 21). Channel is 413. After the second digit is entered, Press and release the "GO" or "CH" button. The light should flash green to confirm.4. Press and release the "1/A" button. The light should flash amber to confirm.

3. First… An Ice-Breaker!

4. puppy : dog :: kitten : • tiger • lion • bear • cat 29 of 31 Answer Now

5. Let’s start with… Vocabulary!!

6. The largest value of a distribution • Minimum • Upper Quartile • Maximum • Lower Quartile • Mean Absolute Deviation • Range • Extremes 28 of 31

7. The ordinary arithmetic average, found by adding up the values of the observations and dividing by the number of observations. 31 • Lower Quartile • Mean Absolute Deviation • Range • Extremes • Mean • Median • Mode 21

8. This rule, which applies only to mound-shaped distributions, tells what percent of the data is found within 1, 2, and 3 standard deviations of the mean. • Minimum • Upper Quartile • Maximum • Lower Quartile • Empirical Rule • Z-Score Rule • Range • Extremes

9. This number indicates how many standard deviations above or below the mean a particular value falls. • Minimum • Upper Quartile • Maximum • Lower Quartile • Empirical Rule • Z-Score • Range • Extremes

10. The middle observation (once the values are arranged in order). • Mean • Median • Mode • Maximum • Lower Quartile • Empirical Rule • Z-Score • Range • Extremes 27 of 31

11. The 25th percentile, or the value such that about 25% of the observations fall below it and 75% above it. • Minimum • Upper Quartile • Maximum • Lower Quartile • Empirical Rule • Range • Extremes

12. The smallest value of a distribution • Minimum • Upper Quartile • Maximum • Lower Quartile • Empirical Rule • Z-Score • Range • Extremes 21 of 31

13. A very simple, but not particularly useful, measure of variability found by calculating the difference between the maximum and minimum values in the data. • Minimum • Upper Quartile • Maximum • Lower Quartile • Empirical Rule • Z-Score • Range • Extremes

14. The most common value, i.e., the one that occurs most frequently. 31 • Minimum • Upper Quartile • Maximum • Lower Quartile • Mean • Median • Range • Mode 27

15. Comprised of the median, quartiles, and extremes of a distribution. This provides a quick and convenient description of where the 4 quarters of the data fall. • 5 Number Summary • Box-and-Whisker Plot • Mean Absolute Deviation (MAD) • Standard Deviation 22 of 31

16. A widely used measure of variability found by calculating the difference between the mean and each observation, squaring that value for each observation, adding the squares, dividing the sum by one less than the sample size, and then taking the square root of the result. • Mean Absolute Deviation • Deviation • Z-Score • Standard Deviation 24 of 31

17. Comprised of the maximum and the minimum of a distribution. 31 • Maximum • Minimum • Extremes • 5 Number summary • Z-Score 21

18. The range of the middle 50% of the data. • Range • Inter-Quartile Range • Lower Quartile • Upper Quartile 22 of 31

19. Data displays this because the values assumed by a variable differ form observational unit to observational unit. • Variability • Data • Bumpiness • Variety • Center 74% 5% 16% 5% 0%

20. The 5-number summary forms the basis for this visual display. • Histogram • 5 Number Summary • Boxplot • Stem and Leaf Plot 25 of 31

21. A rarely used measure of variability found by taking the mean of the absolute deviations from the mean. 31 • Z-Score • Deviation • Standard Deviation • Range • Mean Absolute Deviation 16

22. The number of observations, n. • Sample • Sample Size • Symmetric • Empirical Rule • Variability