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3 years ago

Please help me find the perimeter!! :)

Mathematics

1 answer:

Sholpan [36]3 years ago

7 0

Try to count your square and use the formula lxwxh

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A manufacturer of coffee vending machines has designed a new, less expensive machine. The current machine is known to dispense (

cupoosta [38]

Answer:

$t=(15-1) [\frac{0.219}{0.2}]^2 =16.7864$

$p_v = 2*P(\chi^2_{14}>16.786)=0.5355$

And the 2 is because we are conducting a bilateral test.

$\alpha=0.05$ since the the $p_v >0.05$ we fail to reject the null hypothesis.

$\alpha=0.01$ since the the $p_v >0.01$ we fail to reject the null hypothesis.

Step-by-step explanation:

Data given

$\mu=7$ population mean (variable of interest)

$\sigma=0.2$ represent the population standard deviation

$s=0.219$ represent the sample deviation

n=15 represent the sample size

$\alpha=0.05,0.01$ represent the values for the significance level

Hypothesis test

On this case we want to check if the population standard deviation is equal or not to 0.2, so the system of hypothesis are:

H0: $\sigma = 0.2$

H1: $\sigma \neq 0.2$

In order to check the hypothesis we need to calculate the statistic given by the following formula:

$t=(n-1) [\frac{s}{\sigma_o}]^2$

This statistic have a Chi Square distribution distribution with n-1 degrees of freedom.

What is the value of your test statistic?

Now we have everything to replace into the formula for the statistic and we got:

$t=(15-1) [\frac{0.219}{0.2}]^2 =16.7864$

P value

We know the degrees of freedom of the distribution 14 on this case and we can find the p value like this:

$p_v = 2*P(\chi^2_{14}>16.786)=0.5355$

And the 2 is because we are conducting a bilateral test.

$\alpha=0.05$ since the the $p_v >0.05$ we fail to reject the null hypothesis.

$\alpha=0.01$ since the the $p_v >0.01$ we fail to reject the null hypothesis.

3 0

4 years ago

4+3x-ax=9-7x+bx <br><br> PLEASE HELP

Svet_ta [14]

I believe this is the correct answer:
a=−bx+10x−5x

4 0

3 years ago

Read 2 more answers

What is the mapping rule for a 180 degree rotation about the origin? (x, y)g(–y, x) (x, y)g(–y, –x) (x, y)g(–x, –y) (x, y)g(x, –

il63 [147K]

Answer:

I think it is C but not for sure

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

What is dimensional change in geometry?

gladu [14]

Answer:

When the dimensions of the shape, such as radius, height, or length, change, both surface area and volume also change. However, the volume of the object always changes MORE than the surface area for the same change in dimensions.

Step-by-step explanation:

6 0

3 years ago

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If $110 is invested for one year at 12% simple interest, how much interest is earned?

Vinvika [58]

Answer:

123.20

Step-by-step explanation:

110 times 12% = 13.20

110 + 13.20 =123.20

5 0

3 years ago