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VonneB1684
28.09.2019 •
Mathematics
Amachine that fills bottles with a beverage has a fill volume whose mean is 25.01 ounces, with a standard deviation of 0.02 ounces. a case consists of 24 bottles randomly sampled from the output of the machine. find the standard deviation of the total volume of the beverage in the case.
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Ответ:
The population mean is 25.01 and the population standard deviation is 0.002. To find the sample standard deviation, we use
σₓ = σ/(√n), where σ is the population standard deviation and n is the sample size. Using our information we have:
σₓ = 0.02/(√24) = .004.
Ответ:
First, we have to illustrate the problem. Then we can observe two right triangles formed, one is using Joe and the length of the shadow, the other is the floodlight and the sum of the distance from the base plus the length of the shadow. To determine the height of the floodlight, use ratio and proportion:
1.6 / 2 = x / (2 +3)
where x is the height of the flood light
solve for x, x = 4. Therefore, the height of the floodlight is 4 meters.