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A Gallup poll asked a sample of Canadian adults if they thought the law should allow doctors to end the life of a patient who is in great pain and near death if the patient makes a request in writing. The poll included 290 people in Quebec, 206 of whom agreed that doctor-assisted s should be allowed.
(a) What is the margin of error of the large-sample 90% confidence interval for the proportion of all Quebec adults who would allow this?
MoE:
(b) How large a sample is needed to get a percentage point margin of error (this is very commonly used)? Use the previous sample as a pilot study to get p*.
(You may need four decimal places in your critical value to solve this problem.)
Sample size:
Sagot :
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