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Author Question: Two surgical procedures are widely used to treat a certain type of cancer. To compare the success ... (Read 70 times)

bcretired

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on: Feb 14, 2020

Question 1

Suppose you want to estimate the difference between two population proportions correct to within 0.03 with probability 0.90. If prior information suggests that p1 ≈ 0.4 and p2 ≈ 0.8, and you want to select independent random samples of equal size from the populations, how large should the sample sizes be?
◦ n1 = n2 = 1203
◦ n1 = n2 = 963
◦ n1 = n2 = 1925
◦ n1 = n2 = 1708

Question 2

Two surgical procedures are widely used to treat a certain type of cancer. To compare the success rates of the two procedures, random samples of surgical patients were obtained and the numbers of patients who showed no recurrence of the disease after a 1-year period were recorded. The data are shown in the table.



How large a sample would be necessary in order to estimate the difference in the true success rates to within .10 with 95% reliability?
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Marked as best answer by bcretired on Feb 14, 2020

katkat_flores

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Reply #1 on: Feb 14, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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bcretired

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Reply 2 on: Feb 14, 2020
Thanks for the timely response, appreciate it

Animal_Goddess

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Reply 3 on: Yesterday
Wow, this really help

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