例题8A newspaper poll found that 52 percent of the respondents in a large random sampleof likely voters in a district intend to vote for candidate Smith rather than theopponent. A 95 percent confidence interval for the population proportion wascomputed to be 0.52±0.04. Based on the confidence interval, which of the followingshould the newspaper report to its readers?(A) Smith will win because a majority of voters are in favor of Smith.(B) There is a 95% chance that Smith will win.(C) The poll predicts Smith will win, but there is a 5% chance that the prediction isincorrect due to sampling error.(D) With 95% confidence, there is convincing evidence that Smith will win.(E) No prediction about who will win can be made with 95% confidence.

We have given that the 95% confidence interval for the population proportion was computed to be 0.52…

Answered: A newspaper poll found that 52 percent…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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3. In a random sample of 300 persons eating lunch at a Lexington pizzeria, 270 ordered pizza. a) Find and interpret a 95% confidence interval for the true proportion of people who eat pizza at this Lexington pizzeria? b) If we take 270/300 = 0.90 as an estimate of the corresponding true proportion, with what confidence can we assert that our error is less than 0.04?
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A book club wonders if fewer than 40 percent of students at a local university had read at least one book during the last year. To test the claim, the book club selected a random sample of students at the local university and recorded the number of students who had read at least one book during the last year. The club conducted a test with the hypotheses H0:p=0.40H0:p=0.40 versus Ha:p<0.40Ha:p<0.40. The test yielded a pp-value of 0.033. Assuming all conditions for inference were met, which of the following is an appropriate conclusion? At the significance level α=0.01α=0.01, the null hypothesis is rejected. There is convincing evidence to support the claim that fewer than 40% of the students at the local university read at least one book last year. A At the significance level α=0.01α=0.01, the null hypothesis is rejected. There is not convincing evidence to support the claim that fewer than 40% of the students at the local university read at least one book…
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A small diner gets eggs from 2 suppliers. a sample of 50 eggs from supplier A had a STDEV of 1.1 grams. a sample from supplier B of 40 eggs had a STDEV of .75 grams.a) Construct a 99% confidence for STDEV of supplier BB) at a 4% confidence, conduct a hypothesis test to determine if theres any difference in STDEV between supplier a and b
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