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Measures Of Dispersion Quiz 3 (25 MCQs)

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1. Find the interquartile range for this set of data 1 3 4 6 7 9 11
2. Joanne's Z-score is-1.5. What does this mean?
3. Order the data and find the median or Q22, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 8, 8, 8, 9, 9
4. Which measure of central tendency would not be appropriate to calculate if there is no value that is the most common?
5. What is the outlier in this data set?\{23, 60, 30, 21, 25, 35, 29\}
6. , 10, 12, 12, 15, 17, 19, 20, 26, 21, 24, 30Solve for P50.
7. Which of the measures of dispersion only uses two values in the distribution?
8. How many standard deviations is 95% within the mean?
9. Suppose you have 3 data values of 12, 14, and 16. If a value of 30 is added to the data set, what effect does this have on the mean and standard deviation?
10. Adam's Z-score on a test is +2.5. What does this mean?
11. What is the second step when calculating the Mean Absolute Deviation?
12. In a 100 item test, the passing mark is the 3rd quartile. What does it imply?
13. All examples are method to measure statistical dispersion except
14. Find the MAD for the following set:85, 90, 68, 75, 79
15. , 10, 12, 12, 15, 17, 19, 20, 26, 21, 24, 30Find the D7 score.
16. The time spent in minutes b 20 students waiting in a line to buy their favourite meal were:3.4 2.1 3.8 2.2 4.5 1.4 0 0 1.6 4.8 1.5 1.9 0 3.6 5.2 2.7 3.0 0.8 3.8 5.2What is the upper quartile or Q3?
17. The number of miles that Kiki cycled each week for a 7-week period is shown:36, 42, 28, 52, 48, 36, 31 What is the median number of miles Kiki cycled?
18. The relative measure of dispersion is _____
19. Given the data:136, 150, 119, 150, 125, 140.Find the upper quartile (Q3). (Hint _____ put the numbers in order and find the median to help you find Q3)
20. All of the below sets have the same mean.Set 1-Standard Deviation=3.1Set 2-Standard Deviation=4.9Set 3-Standard Deviation=1.7Set 4-Standard Deviation=3.2Which set of data has points closest to the mean on average (the least average spread)?
21. Find the standard deviation for the following data; 86, 95, 78, 67, and 85.
22. Find the mean of the following data.13, 35, 33, 47, 38, 37, 42, 16, 14
23. Find the MAD:58, 38, 54, 48, 26, 36
24. Find the lower quartile of the following set of scores12, 9, 4, 6, 5, 8, 9, 4, 10, 2
25. What is the name of the curve for the Empirical Rule?
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