The authors of the article "Adjuvant Radiotherapy and
Chemotherapy in Node-Positive Premenopausal Women with Breast
Cancer"† reported on the results of an experiment designed to
compare treating cancer patients with chemotherapy only to
treatment with a combination of chemotherapy and radiation. Of the
154 individuals who received the chemotherapy-only treatment, 76
survived at least 15 years, whereas 98 of the 164 patients who
received the hybrid treatment survived at least that long. With
p1 denoting the proportion of all such women
who, when treated with just chemotherapy, survive at least 15 years
and p2 denoting the analogous proportion for
the hybrid treatment, p̂1 = ________ (rounded
to three decimal places) and p̂2 = ________
(rounded to three decimal places). A confidence interval for the
difference between proportions based on the traditional formula
with a confidence level of approximately 99% is
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The authors of the article "Adjuvant Radiotherapy and Chemotherapy in Node-Positive Premenopausal Women with Breast Cancer"†...
Example 9.13 The authors of the article "Adjuvant Radiotherapy and Chemotherapy in Node-Positive Premenopausal women with Breast Cancer"+ reported on the results of an experiment designed to compare treating cancer patients with chemotherapy only to treatment with a combination of chemotherapy and radiation. Of the 154 individuals who received the chemotherapy-only treatment, 76 survived at least 15 years, whereas 98 of the 164 patients who received the hybrid treatment survived at least that long. With P, denoting the proportion of...
In a randomized trial, 174 women with breast cancer were assigned to receive chemotherapy. Another 164 women were assigned to receive chemotherapy combined with radiation therapy. Survival data after 15 years is given below: a) (1 pt) What is the appropriate test for testing the hypothesis that the treatment type does not affect survival rate? b) (6pts) Perform the test for the hypothesis that the type of treatment does not affect survival rate. Use α=0.05. Clearly state the null and...