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1. Which of the following best describes: 'the measure of the degree of association found between two characteristics in a series of observations?
a. Mean
b. Standard deviation
c. Correlation efficient
d. Standard error of the mean
2. Determine the range of the following set of whole numbers: 12, 13, 15, 17, 12, 18, 12, 19, 13, 12, 14, 13, 12, 15
a. 12-13
b. 12-19
c. 13-14
d. 13-15
3. When considering the standard bell curve, what percentage of observation lies within +/-2 standard deviation of the mean?
a. 68
b. 75
c. 95
d. 99
Test the claim that for the adult population of one town, the mean annual salary is given by μ = $30,000.
A processor of carrots cuts green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted in a box for shipment. To test weight of the boxes, a few were checked.
How many jackets should the store owner order if she wants to maximize her expected profit?
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Calculate correlation coefficient for these sample data.
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Determine the probability the transmission will break down between 100,000 and 200,000 miles?
A sample of twenty automobiles was taken, and the miles per gallon (MPG), horsepower, and total weight were recorded. Develop a linear regression model to predict MPG using horsepower as the only independent variable. Develop another model with weig..
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A major study examined the relationship between cause of death (heart attack, cancer, stroke, accident, etc.) and age. A good way to graphically represent the relationship is with
For the following scores, find the: A. Mean. B Median. C. Sum of squared deviation. D. Variance. E. Standard deviation.
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