Strengths and weaknesses of correlational and regression
What are the strengths and weaknesses of correlational and regression studies. What are the concepts of positive and negative correlations, correlation coefficients, confounding, and causality.
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For a population with a mean of =80 and a sd =12, find the z-score corresponding to each sample mean.
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The number of power outages at a nuclear power plant has Poisson distribution with a mean of 0.8 outage per month. What is probability that there will be at least 3 power outages in the next year? Please show your working.
You run a small furniture business. You sign a deal with a customer to deliver up to 400 chairs, the eact price to be determined by the customer later.
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A population of scores with mu = 50 and sigma = 6. The distribution of sample means based on samples of n=36 deleted from a population with sigma = 6 and mu = 50
A piece of wire 22 m long is cut into two pieces. One piece is bent into a square and the other is bent into a circle. (a) How much wire should be used for the square in order to maximize the total area?
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