Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of error and 95% confidenceintervalSample size, n= 100, sample mean, x=74.0 cm; sample standard deviation, s=4.0 cmThe margin of error is cm(Round to one decimal place as needed)

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Answered: Assume that population mean is to be…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A sample of size 26 was gathered from high school seniors to estimate how many intended to attend the state university. The proportion answering "yes" was 0.65. What are the mean and standard deviation, and standard error of the mean of this şample? mean = standard deviation (accurate to 3 decimal places) = standard error of the mean (accurate to 3 decimal places) = Question Help: Written Example Submit Question hp
Calculate Z-score and Probabilty We have collected data on the total number of minutes people spent in the local emergency room. The times follow a normal model with a mean of 166.9 min and a standard deviation of 55.4 minutes. Find the following: What percent of ER patients spent between 2.5 and 3.5 hours there?
Age Differences In a large hospital, a nursing director selected a random sample of 43 registered nurses and found that the mean of their ages was 31.5. The population standard deviation for the ages is 4.5. She selected a random sample of 32 nursing assistants and found the mean of their ages was 29.7. The population standard deviation of the ages for the assistants is 5.3. Find the 95% confidence interval of the differences in the ages. Use μ1 for the mean age of the nursing assistants. Round the answers to at least one decimal place. Use a TI-83 Plus/TI-84 Plus calculator. ? < μ1- μ2 < ?
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Determine the sample size needed to estimate a population with a mean of 10 units given that the population standard deviation is 50; use a confidence level of 90%.
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eBook The U.S. Energy Information Administration (US EIA) reported that the average price for a gallon of regular gasoline is $3.87. The US EIA updates its estimates of average gas prices on a weekly basis. Assume the standard deviation is $.24 for the price of a gallon of regular gasoline and recommend the appropriate sample size for the US EIA to use if they wish to report each of the following margins of error at 95% confidence. Round up to the next whole number. a. The desired margin of error is $.09. The appropriate sample size is b. The desired margin of error is $.06. The appropriate sample size is c. The desired margin of error is $.05. The appropriate sample size is
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For the specified margin of error and confidence level, obtain a sample size that will ensure a margin of error of at most the one specified. margin of error = 0.03; confidence level = 95% Click here to view Page 1 of the table of areas under the standard normal curve. Click here to view Page 2 of the table of areas under the standard normal curve. (Round up to the nearest integer.) n3=

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