A cancer researcher believes that there may be an increase in the life expectancy of women diagnosed with terminal breast cancer if they attend group therapy in addition to receiving medical treatment such as chemotherapy and radiation. The doctor selects 50 women with stage 4 breast cancer. Twenty-five of these women are randomly assigned to attend group therapy once per week during treatment. The remaining women do not receive group therapy. Survival time, in years, from diagnosis until death is measured for each woman. What hypothesis test should be used to test the doctor's claim? The results of the study are shown in the table below. Women in Therapy Women NOT in Therapy i = 3.8 s = 0.6 E = 2.0 s = 1.5 n = 25 n = 25 Two sample pooled t-test Two sample z-test Two sample paired t-test Two sample not pooled (Welch's) t-test A two sample nonparametric test

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A cancer researcher believes that there may be an increase in the life expectancy of
women diagnosed with terminal breast cancer if they attend group therapy in addition
to receiving medical treatment such as chemotherapy and radiation. The doctor
selects 50 women with stage 4 breast cancer. Twenty-five of these women are
randomly assigned to attend group therapy once per week during treatment. The
remaining women do not receive group therapy. Survival time, in years, from
diagnosis until death is measured for each woman. What hypothesis test should be
used to test the doctor's claim? The results of the study are shown in the table
below.
Women in Therapy
Women NOT in
Therapy
i = 3.8
s = 0.6
* = 2.0
s = 1.5
n = 25
n = 25
Two sample pooled t-test
Two sample z-test
Two sample paired t-test
Two sample not pooled (Welch's) t-test
A two sample nonparametric test
Transcribed Image Text:A cancer researcher believes that there may be an increase in the life expectancy of women diagnosed with terminal breast cancer if they attend group therapy in addition to receiving medical treatment such as chemotherapy and radiation. The doctor selects 50 women with stage 4 breast cancer. Twenty-five of these women are randomly assigned to attend group therapy once per week during treatment. The remaining women do not receive group therapy. Survival time, in years, from diagnosis until death is measured for each woman. What hypothesis test should be used to test the doctor's claim? The results of the study are shown in the table below. Women in Therapy Women NOT in Therapy i = 3.8 s = 0.6 * = 2.0 s = 1.5 n = 25 n = 25 Two sample pooled t-test Two sample z-test Two sample paired t-test Two sample not pooled (Welch's) t-test A two sample nonparametric test
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