3 years ago

Can someone help? What is 20% of 1/2

Mathematics

1 answer:

8090 [49]3 years ago

4 0

0.1
Podras encontrar el resultado en una pagina de calcular porcentajes
=)

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Step-by-step explanation:

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Express each rational number as a fraction or<br> mixed number in simplest form.<br> 25

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A chemist examines 15 geological samples for potassium chloride concentration. The mean potassium chloride concentration for the

Lelu [443]

Answer:

95% Confidence interval: (0.375,0.377)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = 0.376 cc/cubic meter

Sample size, n = 15

Alpha, α = 0.05

Sample standard deviation, s = 0.0012

Degree of freedom =

$=n-1\\=15-1\\=14$

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 14 and}~\alpha_{0.05} = \pm 2.145$

$0.376 \pm 2.145(\dfrac{0.0012}{\sqrt{15}} )\\\\ = 0.376 \pm 0.0006\\\\ = (0.3754,0.3766)\approx (0.375,0.377)$

(0.375,0.377) is the required 95% confidence interval for the population mean potassium chloride concentration.

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2 years ago

Anybody know the answer plzzz i need help

alexandr1967 [171]

B, there is no angles so it has to be SSS

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3 years ago