# PAGE466 by ajizai

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Population 1 will be those who took drug.
Population 2 will be those who took placebo.

■8(����_0:����_����������������≤����_����������������������������@����_����:����_����������������>����_����������������
������������ �������������������� )

There is enough evidence to support the claim that
those who took the drug are more cancer free than
those who took the placebo.
Hypothesized Difference                          0
Level of Significance                          0.1
Group 1
Number of Successes                            291
Sample Size                                    300
Group 2
Number of Successes                            249
Sample Size                                    300

Intermediate Calculations
Group 1 Proportion                             0.97
Group 2 Proportion                             0.83
Difference in Two Proportions                  0.14
Average Proportion                              0.9
Z Test Statistic                          5.715476

Upper-Tail Test
Upper Critical Value                      1.281552
p -Value                                  5.47E-09
Reject the null hypothesis
Z Test for Differences in Two Proportions
Population1 – took migraine drug
Population 2 – took placebo                                                     Data
Hypothesized Difference
Level of Significance
■8(����_0: ����_1≤ ����_2@����_����: ����_1> ����_2 ��������������������)
Group 1
Number of Successes
■8(���� ̂_1= .65, �������� ����_1= .65∗400=260@���� ̂_21= .53, ����   Sample Size
���� ����_2= .53∗407=216)                                                         Group 2
Number of Successes
Sample Size
There is enough evidence to support the claim that
the proportion of subjects who are nausea free is                      Intermediate Calculations
greater for subjects who took the drug than               Group 1 Proportion
subjects who took the placebo.                            Group 2 Proportion
Difference in Two Proportions
Average Proportion
Z Test Statistic

Upper-Tail Test
Upper Critical Value
p -Value
Reject the null hypothesis
0
0.1
1
260
400
2
216
407

alculations
0.65
0.530713
0.119287
0.589839
3.44462

l Test
1.281552
0.000286
hypothesis

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