# statistics exam 3 - ±han ±he score should be divided by...

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Statistics Exam #3 Yasmeen Jones Exam #3 Introductions to Statistics Professor Pieters November 15, 2015 November 17, 2015

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1) The median is sometimes one of the data points in a set of data. This is because if the number of data points is odd, then the median will be one of the data points. Example: For the data set 1, 1, 2, 8, 6, 6, 9 the median is 8. If the number of data points is even, the median will be the average of the two middle data points. Example: For the data set 1, 1, 2, 6, 6, 9 the median is the mean of 2 and 6 ((2+6)/2=4). 2) The difference between the two are: the Empirical Rule applies to normal distributions and the Chebyshev’s Theorem applies to all real-world distributions. 3) Hk 4) After the data values are arranged from lowest to highest, the number of values lower
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Unformatted text preview: ±han ±he score should be divided by ±he ±o±al number of values, and ±hen ±he answer should be multplied by 100. I± rela±es because a percentle score is a score a± a speci´c percen±age, and i± can be found by using ±he process. 5) The median salary would be more useful ±o him because ±he median salary is less inµuenced by very high or very low scores. 6) dasdc 7) D 8) D 9) B 10) Mean=2, Median=1.5, and Mode=1 11) A 12) The mean salary canno± be ob±ained by ´nding ±he mean of \$29,525 and \$33,470 because each of ±he means were reached by averaging a di²eren± number of salaries. The mean will yield ±he mean salary of all employees of ±he company only if ±he number of female employees are equal ±o ±he number of male employees. 13) csd 14) B 15) C 16)...
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