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### Assignment02_OROUR

Course: STATISTICS BA 240, Spring 2011
School: Bellevue College
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Word Count: 921

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Coursehero >> Washington >> Bellevue College >> STATISTICS BA 240

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UpperQuartile(Q3):(3/4)(n+1)=(3/4)(16)=12 Thetwelfthmeasurementis9 b) Slide50 a) 80thPercentile: (p(n+1))/100=(80x16)/100=12.8 Thethirteenthmeasurementis9 Slide52 a) zscorefor10=z=(x(barx))/s=(107.6)/2.32=1.034 zscoreispositive,soIconcludethescoreof10liesadistanceof1.034standard deviationsabove. b) zscorefor10=z=(x(barx))/s=(57.6)/2.32=1.121 c) zscoreisnegative,soIconcludethescoreof5liesadistanceof1.121standard deviationsbelow. 2.34 a) b) StemandLeafofRadioactiveLichenN=9 LeafUnit=0.10 4 2 5 5 0 0 6 6 c) 1 0 6 9 Histogram d)Ipersonallylikethehistogramgraphasbeingthemostinformative.Youcanreallyseethe differenceinthenumberofradioactivelichenwithabarchart.Thedotplotisthesecondmost informativechart,asitalsoshowsthetrendofradioactivelichen.Theleastusefulwasthestem andleafdisplay. e)44.444percentofthemeasurementshavearadioactivitylevelof5.00orlower. 2.90 a)barx,themean,is206/25whichequals8.24. s^2,thesamplevarianceis61.3696/24whichequals2.557. s,thesamplestandarddeviation,isthesquarerootofthesamplevariances^2(2.557),whichis 1.599. b)barx,themean,plusorminusonestandarddeviationequalsarangeof6.641to9.839. Thereare17measurementsoutof25inthesamplewithinonestandarddeviation,or68 percent. Barx,themean,plusorminustwostandarddeviationsequalsarangeof5.042to11.438. Thereare23measurementsoutof25inthesamplewithintwodeviations,or92percent. Barx,themean,plusorminusthreestandarddeviationsequalsarangeof3.443to13.037.All 25measurementsarewithinthreedeviations,or100percent. c)ThepercentagesfoundinpartbareaspredictedbyChebyshevsRuleandtheEmpirical Rule. d)Therangeofthedatasetis7,andtheroughcalculationofthestandarddeviationisbetween 1.167and2.333.Theactualstandarddeviationis1.599,whichliesalmosthalfwaybetweenthe tworoughcalculations. 2.130 a)Thezscoreforthehighestsalaryofferis(75.052.33)/9.22,whichequals2.459.Thezscore forthelowestsalaryofferis(35.052.33)/9.22,whichequals1.880.Thezscoreforthemean salaryofferis0.Thismeansthehighestsalaryofferisunusuallyhigh.The75thpercentileisat \$59.0thousand.Thismeansthehighestsalaryofferis\$16thousandhigherthanthe75th percentilesalary,anunusuallylargeamount.Themeansalaryisonly\$52.33thousandandthe mediansalaryisonly\$51thousand.Thelowestsalaryofferisunusuallylow.The25thpercentile is\$45.3thousand.Thismeansthelowestsalaryofferis\$10.3thousandlowerthanthe25th percentilesalary,wellbelowwhatwouldbeexpected. b) 2.176 a) Huananhujiao 0 Xiaoyiepaai xiang 0 Maoju 0 Dayieju 0 Yansen 0 Bianyiehujiao 0 9 Huanghuahujiao 1 2 5 Jiaju 2 4 5 Bibo 3 1 3 Xieyieju 4 0 Jiaoguohujiao 6 2 Haifengteng (Japan) 7 0 Duomaihujiao Zhangyizhujiao Shinanteng Shanju Haifengteng(Fuji) 5 7 b)ThemeaninhibitionpercentagefortheChineseherbaldrugsis27.824.Themedianinhibition percentagefortheChineseherbaldrugsis24.Themodeoftheinhibitionpercentagesis0.In reviewingthetableabove,IfindthatmostoftheChineseherbaldrugshavelittleeffectin plateletactivatingfactor(PAF)inhibition.Sixoftheherbaldrugs,overathirdofthesurvey,had noeffectatallinpreventingPAF.FourmorefailedtoachieveevenanaveragePAFinhibition rate.Buttherearesomepromisingresultsforthreeoftheherbaldrugs.Theseshowupatthe bottomoftheofthestemandleafdisplay,havingabetterthanseventypercentinhibitionrate. Mostoftheherbaldrugshaveafortypercentorlowerinhibitionrate. c)Themeanandmedianappeartolocatethecenterofthedata.Themodedoesnot.Inviewing thisgraph,itisrightwardskewed.Themodedoesnotlocatethecenterdata. d)Therangeofthedatais77.Thevarianceis777.404.Thestandarddeviationis27.882. e)Fromreviewingthetableandtheinformationregardingthemeanandstandarddeviation,the intervalmostlikelytocapturetheinhibitionpercentageofaChineseherbaldrugis20.
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Bellevue College - STATISTICS - BA 240
3.31a)Outofthepossibledrugcombinations,therearefifteendifferent2drugcombinationsofthesixdrugspossible.6!/(2!*4!)=6*5*4*3*2*1/(2*1)*(4*3*2*1)=720/2*24=720/48=15b)Outofthepossibledrugcombinations,therearedifferenttwentydifferent3drugcombinationsofthesix
Bellevue College - STATISTICS - BA 240
4.15a)Identifythesamplepointsassociatedwiththisexperimentandassignavalueofxtoeachsamplepoint.x=3x=2x=1x=0HHHHHTTTHTTTHTHTHTTHHHTTb)Calculatep(x)foreachvalueofx:x=31/8x=2 1/8+1/8+1/8=3/8x=11/8+1/8+1/8=3/8x=01/8c)Constructaprobability
Bellevue College - STATISTICS - BA 240
5.31a)Findavalueofx0suchthat10%ofxvaluesarelessthanx0.=30,=8P(x)&lt;0.4,z=1.281.28=(x30)/81.28(8)+30=x19.76=xb)findavalueofx0suchthat80%ofxvaluesarelessthanx0.P(x)&lt;.3,z=0.840.84=(x30)/80.84(8)+30=x36.72=xc)findavalueofx0suchthat1%ofxvaluesaregrea
Bellevue College - STATISTICS - BA 240
7.16a)Giveapointestimateforthemeancharitablecommitmentoftaxexemptorganizations:xbar=(charitablecommitment)/302249/30=74.967Becausenislarge(n=30),bytheCentralLimitTheoremxbarisapointestimatorforthemeancharitablecommitmentoftaxexemptorganizations.b)Co
Bellevue College - STATISTICS - BA 240
Bellevue College - STATISTICS - BA 240
Bellevue College - STATISTICS - BA 240
Bellevue College - STATISTICS - BA 240
Bellevue College - STATISTICS - BA 240
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Bellevue College - STATISTICS - BA 240
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Bellevue College - STATISTICS - BA 240
Determinants of Wages from the 1985Current Population Survey Data TableEducation:Numberofyearsofeducation121213126121212111271616131612141288121381114121212911109101312Experience: Wage:Age:YearsofDollars YearsW
Bellevue College - STATISTICS - BA 240
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Bellevue College - STATISTICS - BA 240
Bellevue College - STATISTICS - BA 240
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Bellevue College - STATISTICS - BA 240
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Bellevue College - STATISTICS - BA 240
Bellevue College - STATISTICS - BA 240
9180991109510678121106100978210083115104nmeanstndvarstnddev1697.938159.92912.64648.13321.751.13145.58.6365397.5531.88654.250.882544.25223.13291.1336.75
Bellevue College - STATISTICS - BA 240
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