Test 3 Key005 - waowb x’l‘MoP’le‘ asmus was PM Mm...

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Unformatted text preview: waowb x’l‘MoP’le‘ asmus was PM Mm 5mm 25. A manufacturer claims that a new design for a portable phone has increased the range to 150 eet, allowing many customers to use the phone throughout their homes and yards. An independent testing laboratory found that a random sample of 44 of these phones worked at an average of 142 feet with a standard deviation of 12 feet. Is there sufficient evidence that the true average distance is lower than the manufacturer’s claim of 150 feet? Use a significance level of .05. (1) Complete all 6 steps for a hypothesis test. For Step 3, just list the conditions; do not test the conditions (2) What does your conclusion in Step 6 imply about anu urerg cl'avillgi)I (\ 3 8,15." 5- H0 : )A": (5-0 'F‘i" (“SE 5 h ta,“ (3] 0671‘ I i I W “WM! OIImaqge/diwtm fie fl‘wfi,an (509w— whm IJ‘IS 509+. O02 wnddwn ($93 m Inegwmo, figpfir 50W. Tee-rs. 0N5 MEAN 'T—TESI' , >7 =1|+L fi- - 5’ ”Hiya 6 = 124+ P = .0300 h —-_._ 41+ Phones 51E? 5' Am W 142 {SM ,0; ,W 5mm - cw ) +0 mafia» a? E’W 3:29-54 ' vmwéo 403: NOM' ml'run, ls I50 9+ on. WouLd +0., 19'Zfifi5)&%cam?m W 09,4193'5?” L266 ,003272, _ . ) WJrungrvm d ...
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