9. A political pollster is engaged by a politician to estimate the propor-tion of registered voters in her district who plan to vote for her in thenext election. Find the sample size needed if she wants, with at least95% confidence, the poll to be accurate to withina) 8 percentage points;b) 2 percentage points.(Let p 0.1.)10. Repeat Exercise 9 with p 0.5. Comment on the differences you find.11. The reaction of an individual to a stimulus in a psychological exper-iment may take one of two forms, A or B. If an experimenter wishesto estimate the probability p that a person will react in manner A,how many people must be included in the experiment? Assume thatthe experimenter will be satisfied if the error of estimation is less than0.04 with probability equal to 0.9. Assume also that he expects p tolie in the neighbourhood of of 0.6.Two pODulations of measurements are normally distributed with a

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A political pollster is engaged by a politician to estimate the propor- tion of registered voters in her district who plan to vote for her in the next election. Find the sample size needed if she wants, with at least 95% confidence, the poll to be accurate to within a) 8 percentage points; b) 2 percentage points. (Let p 0.1.)

A political pollster is engaged by a politician to estimate the propor- tion of registered voters in her district who plan to vote for her in the next election. Find the sample size needed if she wants, with at least 95% confidence, the poll to be accurate to within a) 8 percentage points; b) 2 percentage points. (Let p 0.1.)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 6E

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