22 The sample of eight companies in the aerospace industry was surveyed as to their return...
The sample of eight companies in the aerospace industry was surveyed as to their return on investment last year. The results are: 10.6, 12.6, 14.8, 18.2, 12.0, 14.8, 12.2, and 15.6.
Click here for the Excel Data File
a. Compute the sample variance. (Round your answer to 2 decimal places.)
b. Determine the sample standard deviation. (Round your answer to 2 decimal places.)
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22 The sample of eight companies in the aerospace industry was surveyed as to their return...
Exercise 13-17 A recent article in BusinessWeek listed the “Best Small Companies.” We are interested in the current results of the companies' sales and earnings. A random sample of 12 companies wa...
Exercise 13-17 A recent article in BusinessWeek listed the “Best Small Companies.” We are interested in the current results of the companies' sales and earnings. A random sample of 12 companies was selected and the sales and earnings, in millions of dollars, are reported below. Company Sales ($ millions) Earnings ($ millions) Company Sales ($ millions) Earnings ($ millions) Papa John's International $ 86.9 $ 4.7 Checkmate Electronics $ 17.0 $ 4.6 Applied Innovation 19.8 4.4 Royal Grip 12.7 1.7...
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need help on 7b
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The following values are drawn from a normal population. (You may find it useful to reference the appropriate table: chi-square table or table) 35 22 22 30 1930 1919 Click here for the Excel Data File a. Calculate the point estimates for the population variance and the population standard deviation (Round your answers to 4 decimal places.) Point Estimates Population variance Population standard deviation b. Construct the 95% confidence interval for the population variance and the population standard deviation (Round...
A recent article in Bloomberg Businessweek listed the “Best Small Companies.” We are interested in the...
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Consider the following sample data: X y 22 101 24 139 27 250 21 88 23 87 14 14 14 16 15 20 Click here for the Excel Data File b. Calculate by and bo. What is the sample regression equation? (Negative values should be indicated by a minus sign. Round your intermediate calculations to 4 decimal places and final answers to 2 decimal places.) y-hat = c. Find the predicted value for y if x equals 20, 100 and...
need help on 7b
Return It is asserted that 65% of the cars approaching an individual toll booth in New Jersey are equipped with an E-Z Pass transponder. Find the probability that in a sample of eight cars: 2 points Click here for the Excel Data File a. All eight will have the transponder. (Round your answer to 4 decimal places.) Answer is complete and correct. Probability 0.0319 b. At least two will have the transponder. (Round your answer to...
Mr. William Profit is studying companies going public for the first time. He is particularly interested in the relationship between the size of the offering and the price per share. A sample of 15 companies that recently went public revealed the following information. Size ($ millions), Size ($ millions), Price per Share, Company + Company WN- 9.0 94.4 27.3 Price per Share, Y 10.8 11.3 11.2 11.1 11.1 11.2 11.0 160.7 96.5 83.0 23.5 179.2 11.3 10.6 10.5 10.3 10.7...
The following values are drawn from a normal population. (You may find it useful to reference the appropriate table: chi-square table or table) 35 22 22 30 1930 1919 Click here for the Excel Data File a. Calculate the point estimates for the population variance and the population standard deviation (Round your answers to 4 decimal places.) Point Estimates Population variance Population standard deviation b. Construct the 95% confidence interval for the population variance and the population standard deviation (Round...
Consider the following sample data: X y 22 101 24 139 27 250 21 88 23 87 14 14 14 16 15 20 Click here for the Excel Data File b. Calculate by and bo. What is the sample regression equation? (Negative values should be indicated by a minus sign. Round your intermediate calculations to 4 decimal places and final answers to 2 decimal places.) y-hat = c. Find the predicted value for y if x equals 20, 100 and...
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