Mathematics
Mathematics, 14.11.2019 20:31, brittanysanders

Researchers are studying the yield of a crop in two locations. the researchers are going to compute independent 90% confidence intervals for the mean yield at each location. what is the probability that at least one of the intervals will cover the true mean yields at their location?

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Mathematics, 30.07.2019 21:30, NetherisIsTheQueen
Researchers are planning a study to estimate the impact on crop yield when no-till is used in combination with residue retention and crop rotation. based on data from a meta-analysis of 610610 small farms, the researchers estimate there is a 2.5%2.5% decline in crop yield when no-till is used with residue retention and crop rotation. suppose the researchers want to produce a 99%99% confidence interval with a margin of error of no more than 5.5%.5.5%. determine the minimum sample size required for this study. the sample size needed to create a confidence interval estimate depends on the margin of error, the initial estimated proportion, and the confidence level. be sure to use proportions rather than percentages. round your final answer up to the nearest whole number. =n= field comparisons
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Mathematics, 21.08.2019 21:10, sctenk5598
Researchers are planning a study to estimate the impact on crop yield when no-till is used in combination with residue retention and crop rotation. based on data from a meta-analysis of 610610 small farms, the researchers estimate there is a 2.5%2.5% decline in crop yield when no-till is used with residue retention and crop rotation. suppose the researchers want to produce a 99%99% confidence interval with a margin of error of no more than 5.5%.5.5%. determine the minimum sample size required for this study. the sample size needed to create a confidence interval estimate depends on the margin of error, the initial estimated proportion, and the confidence level. be sure to use proportions rather than percentages. round your final answer up to the nearest whole number. =n= field comparisons
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Mathematics, 23.10.2019 22:00, glitch14
In a sample of n 15 lichen specimens, the researchers found the mean and standard deviation of the amount of the radioactive element, cesium-137, that was present to be 0.009 and 0.005 microcurie per illiter, respectively. suppose the researchers want to increase the sample size in order to estimate the mean μ to within 0.001 microcurie per milliliter of its true value, using a 95% confidence interval. complete parts a through c. a. what is the confidence level desired by the researchers? the confidence level is b. what is the sampling error desired by the researchers? the sampling error is c. compute the sample size necessary to obtain the desired estimate. the sample size is(type a whole number.)
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Mathematics, 05.12.2019 21:31, genyjoannerubiera
Researchers are planning a study to estimate the impact on crop yield when no-till is used in combination with residue retention and crop rotation. based on data from a meta-analysis of 610 small farms, the researchers estimate there is a 2.5% decline in crop yield when no-til is used with residue retention and crop rotation. suppose the researchers want to produce a 90% confidence interval with a margin of error of no more than 7.0%. determine the minimum sample size required for this study. the sample size needed to create a confidence interval estimate depends on the margin of error, the initial estimated proportion, and the confidence level. be sure to use proportions rather than percentages. round your final answer up to the nearest whole number. n= comparisons
Answers: 2
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