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4 years ago

79/10 as a mixed number

Mathematics

1 answer:

IRINA_888 [86]4 years ago

6 0

7 and 9/10

Working;
10 goes into 70 7 times. The remainder is 9.

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10.

Kay [80]

Answer:

$\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}$

$4.535 \leq \sigma^2 \leq 7.602$

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

$2.2 \leq \sigma \leq 2.8$

And the best option would be:

A. 2.2 < σ < 2.8

Step-by-step explanation:

Information provided

$\bar X=32.1$ represent the sample mean

$\mu$ population mean

s=2.4 represent the sample standard deviation

n=83 represent the sample size

Confidence interval

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

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

The degrees of freedom are given by:

$df=n-1=83-1=82$

The Confidence is given by 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , the critical values for this case are:

$\chi^2_{\alpha/2}=62.132$

$\chi^2_{1- \alpha/2}=104.139$

And replacing into the formula for the interval we got:

$\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}$

$4.535 \leq \sigma^2 \leq 7.602$

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

$2.2 \leq \sigma \leq 2.8$

And the best option would be:

A. 2.2 < σ < 2.8

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3 years ago

Will give brainliest!! Create a rectangle around the parallelogram. The dimensions of this rectangle are . Find the area of the

bezimeni [28]

Answer:1. 11 by 20 2.110 square units 3. 110 square units

Step-by-step explanation:

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4 years ago

Read 2 more answers

A 1 1/2 ft 2 piece of tile covers 1/96 of the area of a kitchen floor. What is the area of the kitchen floor?

liubo4ka [24]

18 inches * 96 = 1728. 1728 / 12 = 144 feet^2. If you need me to explain better let me know.

6 0

3 years ago

A number is multiplied by 23. The result is 18. Find the original number.

elena-14-01-66 [18.8K]

Answer:

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3 years ago

Write -9.27 as a mixed number

Murljashka [212]

Answer:

The answer is $-9\frac{27}{100}$

Step-by-step explanation:

The answer is in a mixed number form because there is 9 whole numbers and 27 out of 100 left so therefor, the answer is 9 27/100

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4 years ago