Test 4 - test04_s

Aw 0 and concl ude t hat m en and w om en di er i t r

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Unformatted text preview: n gun cont ni roll s. aw 0 ,and concl ude t hat m en and w om en di er i t r n hei D at a:x 1 = 650,n 1 = 1000,x 2 = 600,n 2 = 1000. 10 ( pts) 8.A n envi ronm ent i alstest m at t i es hatt m ean w ast w at he e errecycl by adul s i t U . s m ore t ed t n he S.i han 1 pound pdf person per day. You w ant t t o est t s cl m . You find t hi ai hat t m ean w ast recycl he e ed per person per day f a random sam pl of 12 adul s i t U . s 1. pounds and t st or e t n he S.i 2 he andard devi i i 0. pound.A t = 0. at on s 3 05,can you supportt s cl m ? hi ai H 0 :µ H a :µ > 1 1 ( a)St e t t at he est t be appled;answ er by i cat ng w hi t o i ndi i ch est you w ilappl on your cal at l y cul or, f exam pl 1:ZTEST. or e A pplcabl t : i e est 2:TTEST ( b)Run t t he estand reportbot t t h he estst i i and t P - ue. at st cs he val t estst i i = at st c 2. 3094 P - ue = val 0. 0207 ( c)C oncl on. D eci w het usi de her t rej o ect t nul hypot he l hesi and i erpret t deci on i t s, nt he si n he cont extof t ori nalcl m . he gi ai s entevi dence att he = 0. l 05 evelt say t o hat Sol i ut on:Si nce P ,w e rej ectH 0 .There i su ci t m ean am ountofw ast recycl per person per day i great t he e ed s er han 1 pound per person per day. D at a:n = 12,¯ = 1. x 2,s = 0. 3 STA 2023/T4 ( pts) 10 – Page 4 of 5 – N am e:A nsw er K ey 9.A m edi calresearcher suspect t s hatt pul rat of sm okers i hi he se e s gher t han t pul rat of nonhe se e sm okers.U se t sam pl st i i bel t t he e at st cs ow o estt researcher’ suspi on.U se = 0. he s ci 05. Sm okers n 1 = 100 ¯ x = 88 8 s1 = 4. H H N on- okers sm n 2 = 100 ¯ x = 85 s2 = 5. 3 0 :µ 1 a :µ 1 > µ 2 µ2 w here,µ 1 = “m ean pul rat for sm okers” and µ 2 = “m ean pul rat for non- okers. se e se e sm ” ( a)St e t t at he est t be appled;answ er by i cat ng w hi t o i ndi i ch est you w ilappl on your cal at l y cul or, f exam pl 1:ZTEST. or e A pplcabl t : i e est 3:2-SampZTEST ( b)Run t t he estand reportbot t t h he estst i i and t P - ue...
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