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To help determine how many beers to stock the concession manager at Yankee Stadium wanted to know how the temperature affected beer sales. Accordingly, she took a sample of 10 games and recorded the number of beers sold and the temperature in the middle of the game.
Temperature
Beers
80
20,533
68
1,439
78
13,829
79
21,286
87
30,985
74
17,187
86
30,240
92
37,596
77
9,610
84
28,742
a. Compute the coefficients of the regression line.
b. Interpret the coefficients.
The perimeter of a rectangular painting is 344cm; if the width of the painting is 73 cm, what is the length?
Mothers did not take the drug DES during pregnancy , what is the estimate of the number of women out of 1000 who would be expected to have tissue abnormalities?
The mean (m) number of employee absences in company X is 6 days annually, according to previous studies conducted by the Human Resources Department.
Plan the scatter diagram
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the sample variance 1.8 hours. If μ= 3.0, then calculate the observed value for the t-statistic. Construct 90% confidence interval for the mean.
The sampling distribution of mean score is approximately Normal. It has mean. What is its standard deviation?
joint pmf p(X1,X2)=(X1+2X2)/18, (x1,x2)=(1,1),(1,2),(2,1),(2,2), zero elsewhere. Determine the conditional mean and variance of X2, given X1=x1, for x1=1 or 2. Also compute E(3X1-2X2).
Describe a different example of where the independent variable, while highly correlated to the dependent variable, does not cause the dependent variable to change directly.
The margin of error for polling results is typically determined as the half-width of a 95% confidence interval. With respect to a particular ballot proposition
The sample mean is 2.59 and the sample standard deviation is .66. Conduct the following test using 95% level of confidence. Z-test for Unpaired data.
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