An educator desires to estimate, within 4%, the true percentage of high school students who study at least 1 hour each school night.  He wants to be 95% confident.  How large a sample is necessary?

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 40%. You would like to be 99% confident that your estimate is within 1.5% of the true population proportion. How large of a sample size is required?

You want to obtain a sample to estimate a population proportion. At this point in time you have no reasonable estimate for the population proportion. You would like to be 99.5% confident that your estimate is within 0.5% of the true population proportion. How large of a sample size is required?

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 five percentage points? Complete parts​ (a) through​ (c) below. ​a) Assume that nothing is known about the percentage of computers with new operating systems.   n=0.250.25 ​(Round up to the nearest​ integer.) ​b) Assume that a recent survey suggests that about 99​% of computers use a new operating system.   n=nothing ​(Round up to the nearest​ integer.) ​c) Does the additional survey information from part​ (b) have much of an effect on the sample size that is​ required?     A. ​No, using the additional survey information from part​ (b) does not change the sample size.   B. ​No, using the additional survey information from part​ (b) only slightly increases the sample…

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 95% confident that your estimate is within 5.5% of the true population proportion. How large of a sample size is required?

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 68%. You would like to be 95% confident that your estimate is within 5% of the true population proportion. How large of a sample size is required?

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 6%? A previous study indicates that the proportion of households with two computers is 23%. Group of answer choices

Find the sample size required to estimate the percentage of statistics students who take their statistics course online. Assume that we want 95% confidence that proportion from the sample is within two percentage points of the true population percentage. Answer: Sample size n =

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 90%. You would like to be 98% confident that your estimate is within 3.5% of the true population proportion. How large of a sample size is required?

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 26%. You would like to be 95% confident that your estimate is within 1% of the true population proportion. How large of a sample size is required?