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Question: A researcher has collected all possible samples of a size of 150 from a population and listed the sample means for each of these samples.
a. If the average of the sample means is 450.55, what would be the numerical value of the true population mean? Discuss.
b. If the standard deviation of the sample means is 12.25, determine the standard deviation of the model from which the samples came. To perform this calculation, assume the population has a size of 1,250.
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Determine new, standardized score for each of following values from original population.
Calculate the confidence intervals about a regression line. My data is log transformed and has high R-square value for what is called "power" equation in Excel. My CI's are narrow at the top of the graph and very wide near the bottom.
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A political action committee decided to poll its membership to determine if they were in favor of a certain potential law, similar to gun control.
According to the Sleep Foundation, the average night's sleep is 6.8 hours. Assume the standard deviation is 0.6 hours and the probability distribution is normal. a. What is the probability that a randomly selected person sleeps more than 8 hours?
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You decide to develop a regression model using order value, number of products, and location of the retailer as predictors. Find the model equation. Is it significant at α =0.05?
A Cornell university study of wage differentials between men and women reported that one of the reasons wages for men are higher than wages for women is that men tend to more years of work experience than women. Suppose the following results were ..
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