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(1) A random sample of 10 economists produced the following forecasts for percentage growth in real domestic product in the next year:2.2 2.8 3.0 2.5 2.4 2.6 2.5 2.4 2.7 2.6
Use unbiased estimation procedures to find point estimates for the following:
(a) The population mean? (b) The population variance? (c) The variance of the sample mean (d) The population proportion of economists predicting growth of at least2.5% in real gross domestic product (e) The variance of the sample proportion of economists predicting growth of at least 2.5% in real gross domestic product.
Find the expected value E(X), the varianceVar(X) and the standard deviation σ ( X ) for each of the density functions.
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A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO is less than 1 in every one thousand. State the null hypothesis and the alternative hypothesis for a test of significance.
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Given S is a subset of R. Suppose S' (set of all accumulation points in S) = emptyset. Prove S is countable.
Assuming that the results of a preliminary survey are not available. What is the most conservative estimate of the sample size that would limit the margin of error to within 0.05 of the population proportion for a 95% confidence interval?
a material has a strength coefficient k100000psi a strain hardening exponent n0.2 a yeild strenght approximatel equal
The circumference of a sphere was measured to be 72.000 cm with a possible error of 0.50000 cm. Use linear approximation to estimate the maximum error in the calculated surface area.
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