Calculate the mean number of children
The purchasing department of major company has 100 employees, 22 of whom have no children, 50 of whom have exactly one child, and 28 of whom have exactly two children. Calculate the mean number of children, Calculate the median of the children.
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Explain the difference between correlation and regression and explain the assumptions of the regression model
Suppose that the null hypothesis is H0 : µ = 1000 and the alternative hypothesis H1 : µ 6= 1000. Assuming σ = 200, n = 100, X¯ = 980, and α = 0.01, calculate the value of the test statistic, set up the rejection region
A girl having two siblings is chosen at random. What is the probability that she has no sisters? Define the sample space such that the outcomes are equally likely. Then determine the probability of the desired event.
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A 90% confidence interval estimate for a population mean was computed to be (49.3, 67.9). Determine the mean of the sample, which was used to determine the interval estimate (show all work).
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Respond in a friendly tone, please in a few sentences to this. Effective inquiry questions align with Webb's Depth of Knowledge by encouraging students