Your twenty observations of Dr. Knowitall reveal the following information. Assume that the estimate is to be within 9 percent of the true proportion 90 percent of the time. Activity ObservedNumber of Times ObservedWith patient4Reviewing test results3On phone6Idle3Away on emergency1Not available5Total22 (a) Calculate the sample size needed to estimate the proportion of time Dr. Knowitall spends away on emergencies.(Round your answer to the whole number, the tolerance is +/-1.)Sample size needed is? _____________________ .

The provided information is The margin of error for the proportion is E=9% E=0.09 The level of…

Calculate the sample size needed to estimate the proportion of time Dr. Knowitall spends away on emergencies. (Round your answer to the whole number, the tolerance is +/-1.) Sample size needed is? ___

Calculate the sample size needed to estimate the proportion of time Dr. Knowitall spends away on emergencies. (Round your answer to the whole number, the tolerance is +/-1.) Sample size needed is? ___

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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Question

Your twenty observations of Dr. Knowitall reveal the following information. Assume that the estimate is to be within 9 percent of the true proportion 90 percent of the time.

Activity Observed	Number of Times Observed
With patient	4
Reviewing test results	3
On phone	6
Idle	3
Away on emergency	1
Not available	5
Total	22

(a)

Calculate the sample size needed to estimate the proportion of time Dr. Knowitall spends away on emergencies.

(Round your answer to the whole number, the tolerance is +/-1.)

Sample size needed is? _____________________ .

Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.

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