Test 4 - test04_s

G i enough i hi em ve nform at on t show i o t hat

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Unformatted text preview: G i enough i hi em ve nform at on t show i o t hat you know t correct m et he hod t use. Fi sh o by speci ng w hat cal at t o ni fyi cul or est you w oul d appl y,for exam pl 1:ZTEST.D o notact l perf e ualy orm t t he estofhypot hesi s,no cal at ons f t s cul i or hi probl . em Sol i ut on: Thi i a t oss w sam pl pai e red t t . W e define d = x 1 − x 2 ,and perform 2:TTEST on t - est he resul antonet sam pl dat e a.To do t s,firstent t d - a i o a lst hen appl 2:TTEST. hi er he dat nt i ,t y STA 2023/T4 ( pts) 5 – Page 2 of 5 – N am e:A nsw er K ey 4.A t a l ocalcolege,65 fem al st l e udent w ere random l sel ed and i w as found t s y ect t hat t r m ean hei m ont y i hl ncom e w as $612 w i h a st t andard devi i of $121. at on 50. Sevent five m al st ye udent w ere s al random l sel ed and t r m ean m ont y i so y ect hei hl ncom e w as found t be $654 w i h a st o t andard devi i of$168. at on 70.Testt cl m t he ai hatm al st e udent have a hi s gher m ont y i hl ncom e t han fem al e st udent s.U se = 0. 01. St e t t at he estt be appled i t o i n erm s of t cal at f he cul or unct on ( g.1:ZTEST) i e. : A pplcabl t : i e est 3:2-SampZTEST D o notact l perf ualy orm t t he estofhypot hesi s,no cal at ons f t s probl . cul i or hi em ( pts) 5 5.A fast food out et cl m s t l ai hat t m ean w ai i t m e i lne i l he t ng i ni s ess t han 2. m i es. A random 4 nut sam pl of 20 cust ers has a m ean of 2. m i es w i h a st e om 2 nut t andard devi i of 0. m i e. I at on 8 nut f = 0. 05,t estt fastfood out et s cl m usi P - ues. he l ’ ai ng val St e t t at he estt be appled i t o i n erm s of t cal at f he cul or unct on ( g.1:ZTEST) i e. : A pplcabl t : i e est 2:TTEST D o notact l perf ualy orm t t he estofhypot hesi s,no cal at ons f t s probl . cul i or hi em H ypot hesi ( poi s) s 50 nt . ( pts) 10 6.A lghtbul m anufact i b urerguarant ees t hatt m ean lfe ofa cert n t he i ai ype oflghtbul i atl i bs east750 hours.A random sam pl of 36 lght bul has a m ean lfe of 745 hours w i h a st e i bs i t andard devi i at on...
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This document was uploaded on 02/23/2014.

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