In the Physician's Health Study, 22,071 male physicians participated in a study to determine whether taking a daily low-dose aspirin reduced the risk of heart attacks. The men were randomly assigned to two groups and the study was double-blind. After five years, 104 of the 11,037 men taking a daily low dose aspirin had had a heart attack while 189 of the 11,034 men taking a placebo had had a heart attack. Does taking a daily low-dose aspirin reduce the risk of heart attacks? 1"Final report on the aspirin component of the ongoing Physicians' Health Study. Steering Committee of the Physicians' Health Study Research Group", New England Journal of Medicine. 1989 Jul 20; 321(3): 129-135. (a) State the null and alternative hypotheses. Use subscripts 1 for the treatment group (taking the daily low-dose aspirin) and 2 for the control group (taking a placebo). Ho: :: = ## eTextbook and Media #K test statistic = p-value ::> = μ =441 #22 vs Ha: =1²2 #p #P Pi #Pi #Pi A P2 #r #- #p (b) Give the test statistic and the p-value. Round your intermediate results to four decimal places. Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places. HE #1 18

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Question 11 of 11
In the Physician's Health Study, 22,071 male physicians participated in a study to determine whether taking a daily low-dose aspirin
reduced the risk of heart attacks. The men were randomly assigned to two groups and the study was double-blind. After five years, 104
of the 11,037 men taking a daily low dose aspirin had had a heart attack while 189 of the 11,034 men taking a placebo had had a heart
attack.¹ Does taking a daily low-dose aspirin reduce the risk of heart attacks?
# =
Ho::
1"Final report on the aspirin component of the ongoing Physicians' Health Study. Steering Committee of the Physicians' Health Study
Research Group", New England Journal of Medicine, 1989 Jul 20; 321(3): 129-135.
A
(a) State the null and alternative hypotheses.
Use subscripts 1 for the treatment group (taking the daily low-dose aspirin) and 2 for the control group (taking a placebo).
⠀⠀ #
<
Conter WP NWP A WP NV X WP NWP A WP NWP A
eTextbook and Media
test statistic =
p-value =
#<
i
:: >
μ
tv
vs Ha
#22
41
A
p
42
:: p
Pi
:: Pi
P₂ #r
WP NWP A
P2
I all
⠀⠀
(b) Give the test statistic and the p-value.
Round your intermediate results to four decimal places.
Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places.
-/7 = 1
#p
Å
WP NWP A
2
673
#2₁
Transcribed Image Text:okmarks QQwickl PORTA APR 27 i/v2/assessment-player/index.html?launchid=14b152ee-b56c-49c9-bb3f-91e1a5a70b8b#/question/10 Question 11 of 11 In the Physician's Health Study, 22,071 male physicians participated in a study to determine whether taking a daily low-dose aspirin reduced the risk of heart attacks. The men were randomly assigned to two groups and the study was double-blind. After five years, 104 of the 11,037 men taking a daily low dose aspirin had had a heart attack while 189 of the 11,034 men taking a placebo had had a heart attack.¹ Does taking a daily low-dose aspirin reduce the risk of heart attacks? # = Ho:: 1"Final report on the aspirin component of the ongoing Physicians' Health Study. Steering Committee of the Physicians' Health Study Research Group", New England Journal of Medicine, 1989 Jul 20; 321(3): 129-135. A (a) State the null and alternative hypotheses. Use subscripts 1 for the treatment group (taking the daily low-dose aspirin) and 2 for the control group (taking a placebo). ⠀⠀ # < Conter WP NWP A WP NV X WP NWP A WP NWP A eTextbook and Media test statistic = p-value = #< i :: > μ tv vs Ha #22 41 A p 42 :: p Pi :: Pi P₂ #r WP NWP A P2 I all ⠀⠀ (b) Give the test statistic and the p-value. Round your intermediate results to four decimal places. Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places. -/7 = 1 #p Å WP NWP A 2 673 #2₁
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Question 11 of 11
test statistic = i
p-value =
(b) Give the test statistic and the p-value.
Round your intermediate results to four decimal places.
Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places.
What is the conclusion?
✓ Ho.
eTextbook and Media
O Yes
O No
Conter WP NWP / WP NV X WP NWP A WP NWP A
(c) Does taking a daily low-dose aspirin reduce the risk of heart attacks?
eTextbook and Media
(d) Why can we infer a causal relationship from the results?
O Because the p-value is so low
O Because the p-value is so high
O Because the results are significant and the results come from an experiment
O Because the results are significant and the results come from an observational study
atv
WP NWP A WP NWP
.
A
-/7 = :
O
673
Transcribed Image Text:pogle O. Qwickl APR 27 PORTA s/ui/v2/assessment-player/index.html?launchid=14b152ee-b56c-49c9-bb3f-91e1a5a70b8b#/question/10 Question 11 of 11 test statistic = i p-value = (b) Give the test statistic and the p-value. Round your intermediate results to four decimal places. Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places. What is the conclusion? ✓ Ho. eTextbook and Media O Yes O No Conter WP NWP / WP NV X WP NWP A WP NWP A (c) Does taking a daily low-dose aspirin reduce the risk of heart attacks? eTextbook and Media (d) Why can we infer a causal relationship from the results? O Because the p-value is so low O Because the p-value is so high O Because the results are significant and the results come from an experiment O Because the results are significant and the results come from an observational study atv WP NWP A WP NWP . A -/7 = : O 673
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