alexmoy45p8yd7v
06.12.2019 •
Mathematics
We are willing to regard the wood pieces prepared for the lab session as an srs of all similar pieces of douglas fir. engineers also commonly assume that characteristics of materials vary normally. suppose that the strength of pieces of wood like these follows a normal distribution with standard deviation 3000 pounds. plan: we will estimate μ by giving a 95 % confidence interval. solve: find the sample mean ¯ x
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Ответ:
126: 14 = 9
7 * 4 = 28
126-28 = 98: 2 = 49
49: 10 = 5 phones sold by Mackenzie
49: 4 = 12 + 7 = 19 accessories sold by Mackenzie
Answer: 5phones and 19 accessories.