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Mathematics, 19.05.2020 17:00 abigailweeks10
Price scanners are widely used in U. S supermarkets. While they are fast and easy to use, they also make mistakes. A recent Federal Trade Commission selected a random sample of 800 and 900 merchandise from supermarket scanners and department store scanners, and found that 28 and 82 errored respectively. Obtain a 95% confidence interval for the difference between the error rates of the two scanners and interpret your result in terms of the problem.
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Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?
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Price scanners are widely used in U. S supermarkets. While they are fast and easy to use, they also...
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