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 the sample 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 1521 1674 O 1702 O 2377

A programmer plans to develop a new software system. In planning for the operating system that he will​ use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 95​% confident that his estimate is in error by no more than three percentage points? Complete parts​ (a) through​ (c) below.Question content area bottomPart 1​a) Assume that nothing is known about the percentage of computers with new operating systems. n=enter your response here ​(Round up to the nearest​ integer.)Part 2​b) Assume that a recent survey suggests that about 96​% of computers use a new operating system.n=enter your response here ​(Round up to the nearest​ integer.)Part 3​c) Does the additional survey information from part​ (b) have much of an effect on the sample size that is​ required?A.​Yes, using the additional survey information from part​ (b) dramatically reduces the sample size.B.​Yes, using the additional survey information…

1.) I want to estimate the proportion of adults who like sci-fi movies. How many people should I poll to be 96% confident that I am within 1% of the population proportion?

You are doing a research project in political science to determine the proportion of voters in your district who favor capital punishment. a. If no preliminary sample of voters is taken to estimate p, how large a sample is necessary to be 99% sure that the point estimate will be within a distance of .01 from p? b. The NORC found that approximately 67% of people in the U.S. favor capital punishment. How large a sample is necessary to be 99% sure that the point estimate will be within a distance of .01 from p?

Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the​ Internet? Assume that we want to be 95​% confident that the sample percentage is within two percentage points of the true population percentage for all sales transactions. n= ​(Round up to the nearest​ integer.)

A researcher wishes to estimate the proportion of households with two cars.a) How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the true proportion by more than 3%?b) Repear part a if a previous study indicates that the proportion of households with two cars is 25%.

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 you want to be 90% confident that the sample percentage is within 2.5 percentage points of the true population percentage. Completed parts a and b below. A.) assume that nothing is known about the percentage of passengers who prefer aisle seats. N= ____ (round up to the nearest integer) B.) assume that a prior survey suggest that about 35% of air passengers prefer an aisle seat. N=____ (round up to the nearest integer)

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 5.5 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. (Round up to the nearest integer.) b. Assume that a prior survey suggests that about 38% of air passengers prefer an aisle seat. (Round up to the nearest integer.)

Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the Internet? Assume that we want to be 99% confident that the sample percentage is within two percentage points of the true population percentage for all sales transactions. n = (Round up to the nearest integer.)

In a recent survey of 157 WMU graduates, 117 students said that parking was too limited on campus. What is the estimate of the population proportion? What is the standard error of this estimate?   Question 7 options:   1)  Estimate of proportion: 0.745, Standard error: 0.0348.   2)  Estimate of proportion: 0.255, Standard error: 0.0028.   3)  Estimate of proportion: 0.745, Standard error: 0.0028.   4)  The true population proportion is needed to calculate this.   5)  Estimate of proportion: 0.255, Standard error: 0.0348.