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.

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

a

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for me what is finding a good play list and going out because i can not lay down and relax so i usually go to a coffee shop. i also use the gum trick and this actually works. another advice is highlighting subjects it really does me remember certain things

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the answer is 54 sq. ft. i just did this question, on odyssey ware, and it was right. make brainliest.