Question

Do various occupational groups differ in their diets? A British
study of this question compared 87 drivers and 53 conductors of
London double-decker buses. The conductors' jobs require more
physical activity. The article reporting the study gives the data
as "Mean daily consumption ± (*se*)." Some of the study
results appear below.

Drivers | Conductors | |
---|---|---|

Total calories | 2818 ± 43 | 2850 ± 46 |

Alcohol (grams) | 0.21 ± 0.1 | 0.45 ± 0.06 |

(a) Is there significant evidence at the 5% level that
conductors consume more calories per day than do drivers? Use the
pooled two-sample *t* test to obtain the *P*-value.
(Give answers to 3 decimal places.)

t=

df=

P-value=

Answer #1

a)

from above

t=-4.159 (try 4.159 if this comes wrong and revet)

df=138

p value =0.000

Do various occupational groups differ in their diets? A British
study of this question compared 89 drivers and 69 conductors of
London double-decker buses. The conductors' jobs require more
physical activity. The article reporting the study gives the data
as "Mean daily consumption ± (se)." Some of the study
results appear below.
Drivers
Conductors
Total calories
2815 ±
40
2848 ±
45
Alcohol (grams)
0.27 ± 0.06
0.4 ± 0.05
Question:Is there significant evidence at the 5% level that
conductors...

Do various occupational groups differ in their diets? A British
study of this question compared 88 drivers and 59 conductors of
London double-decker buses. The conductors' jobs require more
physical activity. The article reporting the study gives the data
as "Mean daily consumption ± (se)." Some of the study
results appear below.
Drivers
Conductors
Total calories
2824 ± 42
2843 ± 47
Alcohol (grams)
0.21 ± 0.04
0.4 ± 0.1
What justifies the use of the pooled two-sample t
test?...

Do various occupational groups differ in their diets? A British
study of this question compared 89 drivers and 61 conductors of
London double-decker buses. The conductors' jobs require more
physical activity. The article reporting the study gives the data
as "Mean daily consumption ± (se)." Some of the study
results appear below.
Drivers
Conductors
Total calories
2815 ± 42
2845 ± 48
Alcohol (grams)
0.24 ± 0.08
0.4 ± 0.09
What justifies the use of the pooled two-sample t
test?...

Do various occupational groups differ in their diets? A British
study of this question compared 91 drivers and 63 conductors of
London double-decker buses. The conductors' jobs require more
physical activity. The article reporting the study gives the data
as "Mean daily consumption ± (se)." Some of the study
results appear below.
Drivers
Conductors
Total calories
2827 ± 14
2843 ± 18
Alcohol (grams)
0.24 ± 0.11
0.37 ± 0.15
(a) Give x and s for each of the four...

Do various occupational groups differ in their diets? A British
study of this question compared 89 drivers and 66 conductors of
London double-decker buses. The conductors' jobs require more
physical activity. The article reporting the study gives the data
as "Mean daily consumption ± (se)." Some of the study results
appear below. Drivers Conductors Total calories 2827 ± 14 2845 ± 15
Alcohol (grams) 0.27 ± 0.07 0.37 ± 0.12
(a) Give x and s for each of the four...

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