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2 years ago

What features best describe this graph?

Mathematics

2 answers:

erastova [34]2 years ago

6 0

Answer:

glee

Step-by-step explanation:

Aleks04 [339]2 years ago

3 0

Answer: umm i have no idea sry

Step-by-step explanation:

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Flow meters are installed in urban sewer systems to measure the flows through the pipes. In dry weatherconditions (no rain) the

ziro4ka [17]

Answer:

a) $\frac{(8)(30.23)^2}{20.09} \leq \sigma^2 \leq \frac{(8)(30.23)^2}{1.65}$

$363.90 \leq \sigma^2 \leq 4430.80$

Now we just take square root on both sides of the interval and we got:

$19.08 \leq \sigma \leq 66.56$

b) For this case we are 98% confidence that the true deviation for the population of interest is between 19.08 and 66.56

Step-by-step explanation:

423.6, 487.3, 453.2, 402.9, 483.0, 477.7, 442.3, 418.4, 459.0

Part a

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

On this case we need to find the sample standard deviation with the following formula:

$s=sqrt{\frac{\sum_{i=1}^8 (x_i -\bar x)^2}{n-1}}
And in order to find the sample mean we just need to use this formula:
[tex]\bar x =\frac{\sum_{i=1}^n x_i}{n}$

The sample deviation for this case is s=30.23

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

$df=n-1=9-1=8$

The Confidence interval is 0.98 or 98%, the value of $\alpha=0.02$ and $\alpha/2 =0.01$ , and the critical values are:

$\chi^2_{\alpha/2}=20.09$

$\chi^2_{1- \alpha/2}=1.65$

And replacing into the formula for the interval we got:

$\frac{(8)(30.23)^2}{20.09} \leq \sigma^2 \leq \frac{(8)(30.23)^2}{1.65}$

$363.90 \leq \sigma^2 \leq 4430.80$

Now we just take square root on both sides of the interval and we got:

$19.08 \leq \sigma \leq 66.56$

Part b

For this case we are 98% confidence that the true deviation for the population of interest is between 19.08 and 66.56

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2 years ago

HELLPPPPPPP BRAINLIEST

zvonat [6]

Answer:

the answer is 5

Step-by-step explanation:

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2 years ago

When is the magnetic field the strongest?

kodGreya [7K]

When it's by the magnetic poles

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2 years ago

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If p+q has the value that is exactly 1/3 less than p what is the value of q

solmaris [256]

Answer:

q = - $\frac{1}{3}$ p

Step-by-step explanation:

$\frac{1}{3}$ less than p = $\frac{2}{3}$ p

Thus

p + q = $\frac{2}{3}$ p ( multiply through by 3 to clear the fraction )

3p + 3q = 2p ( subtract 3p from both sides )

3q = - p ( divide both sides by 3 )

q = - $\frac{1}{3}$ p

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2 years ago

What is the LCD for 1/8 7/9 and 1/6

frez [133]

Answer:

the least common denominator (LCD) is 24.

Step-by-step explanation:

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2 years ago

What features best describe this graph?​

What features best describe this graph?