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Please solve the following problem, and provide explanations as to why you get an answer(s) you get in each step.
a) Calculate the sample mean of the numbers in the sample seen above (?x?1 and x?2).
b) Calculate the sample variance of the numbers in your sample.
c) Calculate the sample variance in a different way: use in the denominator the sample size, in this case n = 2, as opposed to the correct number of degrees of freedom, n - 1 = 1.
d) Calculate the sample variance in a different way: instead of the sample mean ¯x, use the known population mean µ = 0. Use n-1 = 1 as he number of degrees of freedom.
e) Calculate the sample variance in yet another way: still use µ = 0 instead of ¯x, but this time use n = 2 as the number of degrees of freedom.
Using the following information, find the equation of the regression line, and predict the heart rate when 0.27 milligrams of the drug is used.
A sample of 500 respondents was selected in a large metropolitan area to determine various information concerning consumer behavior, Among the questions asked was "Do you enjoy shopping for clothing?
Identify the value that corresponds to: (i) the point estimate and (ii) the margin of error for the following confidence interval: 4.9 ± 0.8.
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If you randomly sample one score from this distribution, what is the probability it will be between 110 and 125?
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many consumers pay careful attention to stated nutritional contents on packaged foods when making purchases. it is
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