Mathematics, 16.04.2020 20:32 Doogsterr
You are to conduct a sample survey to determine the mean family income in Washington County, Vermont. The question is how many families should be sampled. In a pilot sample of 10 families the standard deviation was equal to $500. If you want to be 95% confident that the estimate of mean family income will lie within $50 of the true level, how many families must you sample.
Answers: 2
Mathematics, 21.06.2019 14:30
Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.
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Mathematics, 21.06.2019 17:30
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The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212
Answers: 1
You are to conduct a sample survey to determine the mean family income in Washington County, Vermont...
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