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Mathematics, 24.05.2020 00:03, jasonr182017
The Pew Internet and American Life Project reports that American adults send a mean of 20 text messages per day. A random sample of 60 American adults showed a mean of 22 text messages per day. Assume that the population standard deviation is 20 text messages. Test using the level of significance Ī± =0.01 whether the population mean number of text messages per day is greater than 20
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Mathematics, 22.06.2019 03:30, shygorringe
The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?
Answers: 3
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The Pew Internet and American Life Project reports that American adults send a mean of 20 text messa...
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