UU Window Window Help A Sun 10.30 PM Nettisest ucs, Hw Math Hw STUDYBLUE Apple G
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UU Window Window Help A Sun 10.30 PM Nettisest ucs, Hw Math Hw STUDYBLUE Apple Gcu Gcu Mal icloud Facebook MasteringA&P; Google Twitter YouTube yeezy /2 points Mitrostate 7 E two. various occupational groups differ in their diets? A British My Notes o Ask Yes tivity. The article study of this question compared 91 drivers and conductors of London double-decker buses. The cond jobs require more pr reporting the study gives the data as "Mean daily consumption 63 appear below. s (se)." Some of the study results Drivers conductors Total calories 2828 t 10 2848 t 17 Alcohol (grams) 0.29 t 0.08 0.38 t 0.14 (a) Give x and s for each of the four sets of measurements. (Give accurate to 3 decimal places) Drivers Total calories: x answers Drivers Alcohol x Conductors Total Calories x- (b) Is there significant evidence at the 5% level that conductors consume more calories per day than do drivers? Use the conservative two-sample t method to find the t-statistic, and the degrees of freedom. (Round your answer for t to three decimal places.) Reject Ho- Do not reject Ho (c) How significant is the observed difference in mean alcohol consumption? use the conservative two-sample t method to obtain the t-statistic. (Round your answer to three decimal places. Reject Ho. Do not reject HoExplanation / Answer
a) drivers total calories x bar = 2828
s : 10 = s / sqrt(91)
= 95.393
drivers alcohol x bar = 0.29
s : 0.08 = s / sqrt(91)
= 0.763
Conductors total calories x bar = 2848
s : 17 = s / sqrt(63)
= 134.933
drivers alcohol x bar = 0.38
s : 0.14 = s / sqrt(63)
= 1.111
d) Z value at 95% confidence interval = 1.96
CI = mean +/- Z * SE
= 0.38 + / - 1.96 * 0.14
= (0.105 , 0.654)
e) Z value at 95% confidence interval = 1.96
CI = ( 0.38 - 0.29 ) + / - 1.96 * ( 0.14 + 0.08)
= (-0.341 , 0.521)
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