Is anyone smart enough to fill this out? will mark

Ответ:

gbprulesmile

22.01.2022

FIRST BOX IS 4

SECOND BOX IS 3

THIRD BOX IS 5

FOURTH BOX IS 2

Step-by-step explanation:

(4x-3)(3x+5)=12x^2- 2x-15

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aaron2113

03.02.2023

The answer is "(4.518, 5.182)"

Step-by-step explanation:

$\sigma = 0.74$

The aveage porosity for a sample of n = 19 specimens is

$\bar{x}=4.85$

Thus, the $95\%$ confidence interval for the true mean is

$=\bar{x}\pm Z_{\frac{0.05}{2}} \frac{\sigma}{\sqrt{n}}\\\\=4.85\pm 1.96 \frac{0.74}{\sqrt{19}}\\\\=4.85\pm 0.332\\\\=(4.518, 5.182)$

Therefore, one can state that the true average porosity will lie between 4.518 and 5.182 with the 95\% confidence.

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