Safari File Edit View History Bookmarks Window Help Take Test: Chapter 3 Practic

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Safari File Edit View History Bookmarks Window Help Take Test: Chapter 3 Practice Quiz - Statistical Methods https://atlanticbb9.blackboard.com/webapps/assessment/take/launch.jsp/course assessment id- 50483 1&course;_id186 untitled folder Find the modal class. Give the class boundaries for the modal class, otherwise the answer will be marked incorrect. QUESTION 6 For 75 employees of a large department store, the following distribution for years of service was obtained. Class Limits Frequency 1-5 6-10 11-15 16-20 21 25 15 21-25 26-30 Find the variance. Round to two decimal places (oxample: 5.67·If you do round correctly. the answer will be mated incorrect. QUESTION 7 Tre mean of a distribution is 50 and the standard deviation is 5 Between whatto values w.. at least 8889% d the data vakea tin and 65 Click Save and Suhet to sque und sumt, Cick Sae All Ansuvers to s lf a Save All Answers MacBook 2 3 5 6 7

Explanation / Answer

Ans:

Variance=4512/75=60.16

class midpoint,m f m*f (m-10.8)^2*f 1-5 3 21 63 1277.64 6-10 8 25 200 196 11-15 13 15 195 72.6 16-20 18 0 0 0 21-25 23 8 184 1190.72 26-30 28 6 168 1775.04 Total 75 810 4512 mean= 10.8 variance= 60.16

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