MATLAB: An Introduction with Applications
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Author: Amos Gilat
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Which of the following statistical methods should you use. Question is at top of page
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Suppose you wanted to test whether there was any difference between the average age of husbands and the average age of wives. You collected the age information of a
random sample of 200 married men and a random sample of 200 married women. Which of the following statistical methods should you use?
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We constructed a 95% confidence interval for a population mean. Which of the following would cause the confidence interval to become wider? Please select all that apply.
Keep constant the sample mean, the sample standard deviation, and the sample size; increase the confidence level to 99%.
Keep constant the sample mean, the sample standard deviation, and the sample size; decrease the confidence level to 90%.
Keep constant the confidence level, the sample mean, and the sample standard deviation; increase the sample size.
Keep constant the confidence level, the sample standard deviation, and the sample size; increase the sample mean.
Keep constant the confidence level, the sample mean, and the sample size; increase the sample standard deviation.
A research
team ran two studies. In each study, measurements were collected for three treatment groups. If we were to run an ANOVA for the data in Study A and another
ANOVA for the data in Study B, how will their test statistic values compare?
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