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Measures Of Dispersion Quiz 2 (25 MCQs)

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1. Which of the measures of location is used in computing for the variance of a distribution?
2. The salary of the employees in the office were $ 15, 000; $ 18, 000; $ 16, 000; $ 14, 000; $ 90, 000; and $ 17, 000. What is the best measure of the central tendency of the salaries?
3. What is the mean of this data set?6, 7, 2, 1, 5, 2, 1, 6
4. If 10 is added to every value in a set of data, what will happen to the value of the median?
5. A set of of data has a minimum value of 15 and a maximum value of 40. Find the new range if two numbers, 8 and 35, are added to the set of the data.
6. A teacher needs to report the average of her last long quiz to her superior. Here are the scores, 58, 37, 25, 43, 38, 22, 31, 49, 53, 28.
7. The Variance of a data is 2.5. Find the new variance if each data is multiplied by 3.
8. If a data set is bimodal, how many modes does it have?
9. What measures of position divides the distribution into 4 equal parts?
10. Find the range of these numbers:15, 2, 3, 7, 8, 4, 3, 2, 16, 2, 4
11. How to find interquartile range for group data?
12. The positive square root is taken of the population variance then collected measure is transformed into _____
13. A number that is either MUCH larger or MUCH smaller than the rest of the numbers is a(n)
14. Coefficient of standard deviation is the ratio of _____
15. It is most appropriate to calculate the mean when using which level of measurement?
16. What does this symbol represent? $ \sigma$
17. Given the range is 5, if each data is multiplied with 3, what is the value of new range?
18. The variance of a set of data is 18. Find the new variance if each value in the set of the data is substracted by 5 and the divided by 3.
19. The variance of a set of the data is 35. If each value in the set of the data is multiplied by 2, find the new variance.
20. What measure of center is best to use when we have outliers?
21. What is the standard deviation for the data given:\{12, 13, 29, 18, 61, 35, 21\}
22. Which of the following best describes the process of finding the range for a set of data?
23. What is the first step when calculating the popular standard deviation?
24. Find the interquartile range of the data:20, 22, 25, 29, 31
25. Find the Mean Absolute Deviation:10, 9, 3, 8, 10. The Mean is 8
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