15.A manufacturer withdrew Drug Upper VDrug V from the market after a study reve
ID: 3060539 • Letter: 1
Question
15.A manufacturer withdrew
Drug Upper VDrug V
from the market after a study revealed that its use was associated with an increase in the risk of heart attack. The experiment was placebo-controlled, randomized, and double-blind. Out of
12801280
people taking
Drug Upper VDrug V
there were
4747
heart attacks, and out of
12631263
people taking the placebo, there were
2323
heart attacks. Perform a hypothesis test to test whether those who take
Drug Upper VDrug V
have a greater rate of heart attack than those who take a placebo. Use a level of significance of
0.100.10.
Can we conclude that
Drug Upper VDrug V
causes an increased risk of heart attack?
A manufacturer withdrew Drug V from the market after a study revealed that its use was associated with an increase in the risk of heart attack. The experiment was placebo-controlled, randomized, and double-blind. Out of 1280 people taking Drug V there were 47 heart attacks, and out of 1263 people taking the placebo, there were 23 heart attacks. Perform a hypothesis test to test whether those who take Drug V have a greater rate of heart attack than those who take a placebo. Use a level of significance of 0.10. Can we conclude that Drug V causes an increased risk of heart attack? Determine the hypotheses for this test. Let p1 represent the population proportion of heart attacks for those who take Drug V and let p2 represent the population proportion of heart attacks for those who take the placebo. Choose the correct answer below. OA, Ho: p1-p2 Ha P1 P2 OE. Ho :P1=P2 Ha P1 P2 HaPP2 Ha : p1 = p2 O F. Ho P1P2 Ha PP2 D. Ho:p1=p2 Find the test statistic for this test z = | | (Round to three decimal places as needed.)Explanation / Answer
The statistical software output for this problem is:
Two sample proportion summary hypothesis test:
p1 : proportion of successes for population 1
p2 : proportion of successes for population 2
p1 - p2 : Difference in proportions
H0 : p1 - p2 = 0
HA : p1 - p2 > 0
Hypothesis test results:
Hence,
Hypotheses: Option A is correct.
z = 2.852
P - value = 0.002
Reject Ho
Conclusion: Option A is correct.
Difference Count1 Total1 Count2 Total2 Sample Diff. Std. Err. Z-Stat P-value p1 - p2 47 1280 23 1263 0.01850814 0.0064890518 2.8522103 0.0022Related Questions
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