Ocessing of raw coal involves "washing," in which coal ash (nonorganic, incombustible material) is removed. the article "quantifying sampling precision for coal ash using gy’s discrete model of the fundamental error" (journal of coal quality, 1989: 33–39) provides data relating the percentage of ash to the volume of a coal particle. the average percentage of ash for six volumes of coal part was measured, and represented below: volume (cm3) 0.01 0.06 0.58 2.24 15.55 276.02% ash 3.32 4.05 5.69 7.06 8.17 9.36compute the least square line for predicting percent ash from in volume.

y = 5.5765*x + 0.0142

Step-by-step explanation:

Let's consider the volume as the explanatory variable x and the percentage of ash as the response variable y

We construct the following table

Once this table is built, the rest is easy.

The least squares line is given by

y = mx + b

where  

where n is the number of observations taken, in this case 6.

Computing all these values we have our least squares line

And that's it!

answer: 140

step-by-step explanation:

so just add all then it will be your answer but i am not pretty sur eif it is but hope this i am here to people

42%

step-by-step explanation:

we know,

total people = 60

total males = 25

percentage of males

= 25/60 × 100

= 25/6 × 10

= 25/3 × 5

= 125 / 3

= 41.

rounding of = 42%

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