Exam (elaborations)
PROBABILITY AND STATISTICS EXAM 1 (CHAPTER 1, 2, 3) QUESTIONS WITH CORRECT ANSWERS.
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PROBABILITY AND STATISTICS EXAM 1 (CHAPTER 1, 2, 3) QUESTIONS WITH CORRECT ANSWERS.
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PROBABILITY AND STATISTICS EXAM 1(CHAPTER 1, 2, 3) QUESTIONS WITH
CORRECT ANSWERS
For llthe llfollowing llfrequency lldistribution, llhow llmany llindividual llscores llare llin llthe
llentire llset?
x llf
5 ll2
4 ll4
3 ll1
2 ll3 ll- llAnswer llN=10
Consider llthe llfollowing llordered lldata.
4 ll7 ll7 ll8 ll9 ll9 ll10 ll11 ll12
(a) llFind llthe lllow, llQ1, llmedian, llQ3, lland llhigh.
(b) llFind llthe llinterquartile llrange. ll- llAnswer ll(a) lllow ll4
Q1 ll7
median ll9
Q3 ll10.5
high ll12
(b) ll3.5
How lllong lldid llreal llcowboys lllive? llOne llanswer llmay llbe llfound llin llthe llbook llThe llLast
llCowboys llby llConnie llBrooks ll(University llof llNew llMexico llPress). llThis lldelightful
llbook llpresents lla llthoughtful llsociological llstudy llof llcowboys llin llWest llTexas lland
llSoutheastern llNew llMexico llaround llthe llyear ll1890. llA llsample llof ll32 llcowboys llgave
llthe llfollowing llyears llof lllongevity:
58 ll52 ll68 ll86 ll72 ll66 ll97 ll89 ll84 ll91 ll91 ll92 ll66 ll68 ll87 ll86 ll73 ll61 ll70 ll75 ll72 ll73 ll85 ll84
ll90 ll57 ll77 ll76 ll84 ll93 ll58 ll47
(a) llMake lla llstem-and-leaf lldisplay llfor llthese lldata. ll(Use llthe lltens lldigit llas llthe llstem
lland llthe llones lldigit llas llthe llleaf. llEnter llnumbers llfrom llsmallest llto lllargest llseparated
llby llspaces. llEnter llNONE llfor llstems llwith llno llvalues.) ll- llAnswer ll4-7
5-2 ll7 ll8 ll8
6-1 ll6 ll6 ll8 ll8
7-0 ll2 ll2 ll3 ll3 ll5 ll6 ll7
8-4 ll4 ll4 ll5 ll6 ll6 ll7 ll9
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