A researcher wishes to estimate the number of households with two computers. How large a sample is needed in order to be 90% confident that thesample proportion will not differ from the true proportion by more than 2%?A previous study indicates that the proportion of households with two computers is 45%.O 1521O 1674O 1702O 2377

Givenconfidence level = 90%Margin of error(E)=2%=0.02p^=0.45

Answered: A researcher wishes to estimate the…

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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You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. how many randomly selected air passengers must you survey? assume that you want to be 90% confident that the sample percentage is within 3.5 percentage points of the true population percentage. Assume that nothing is known about the percentage of passengers who prefer aisle seats. n= Round to the nearest integer.
Scanned with CamScanner 10. You wish to estimate, with 95% confidence, the proportion of senior high students in your school who read the first book of Harry Potter. Your estimate must be accurate within 2% of the population proportion. With no preliminary estimate available, what is the minimum sample size that you need? C. at least 2506 D. at least 2605 A. at least 2301 B. at least 2401
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Statistics Question
Random samples of students at 107 four-year colleges were interviewed several times since 1998. Of the students who reported drinking alcohol, the percentage who reported bingeing at least three times within the past two weeks was 41.1% of 336 students in 1998 and 21.6% of 843 students in 2004. a. Estimate the difference between the proportions in 2004 and 1998, and interpret. b. Find the standard error for this difference. Interpret it. c. Define the two relevant population parameters to compare in the context of this exercise. d. Construct and interpret a 90% confidence interval to estimate the true difference. e. State the assumptions for the confidence interval in part d to be valid. ... A. The number of students in the population in 2004 who reported drinking alcohol that binged at least three times within the past two weeks. B. The proportion of the student population in 1998 who reported drinking alcohol that binged at least three times within the past two weeks. C. The number…
Suppose that you calculated the sample size needed to estimate a population proportion within a given margin of error and the answer came out to n = 115.26. How many items should be sampled? O 115 O 100 O 116 O 115.26
You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 90% confident that the sample percentage is within 1.5 percentage points of the true population percentage. Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. =ח (Round up to the nearest integer.) b. Assume that a prior survey suggests that about 34% of air passengers prefer an aisle seat. =ח (Round up to the nearest integer.)
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