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navik [9.2K]
2 years ago
6

What number has 12,24, and 30 as multiples explain how u found out the answer

Mathematics
1 answer:
Marina CMI [18]2 years ago
3 0

The number 5760 because when divided by 12 you get an answer of 480 and with 24 it is 240 and with 30 is 192.
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Watching tv: in 2012, the general social survey asked a sample of 1310 people how much time they spend\t watching tv each day. T
garik1379 [7]

Answer:

a) Null hypothesis:\mu \geq 3  

Alternative hypothesis:\mu < 3  

This hypothesis test is a left tailed test.

b) t=\frac{2.8-3}{\frac{2.6}{\sqrt{1310}}}=-2.784  

The p value for this case can be calculated with this probability:  

p_v =P(z  

We can conduct the test with the Ti84 using the following steps:

STAT>TESTS>T-test>Stats

We input the value \mu_o =3, \bar X= 2.8, s_x = 2.6, n=1310 and for the alternative we select < \mu_o. Then press Calculate.

And we got the same results.  

Step-by-step explanation:

Information given

\bar X=2.8 represent the sample mean

s=2.6 represent the population standard deviation  

n=1310 sample size  

\mu_o =3 represent the value to test

\alpha=0.5 represent the significance level for the hypothesis test.  

t would represent the statistic

p_v represent the p value for the test

Part a) System of hypothesis

We want to test if the true mean is less than 3, the system of hypothesis would be:  

Null hypothesis:\mu \geq 3  

Alternative hypothesis:\mu < 3  

This hypothesis test is a left tailed test.

Part b

The statistic is given by:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)  

Replacing the info given we got:

t=\frac{2.8-3}{\frac{2.6}{\sqrt{1310}}}=-2.784  

The p value for this case can be calculated with this probability:  

p_v =P(z  

We can conduct the test with the Ti84 using the following steps:

STAT>TESTS>T-test>Stats

We input the value \mu_o =3, \bar X= 2.8, s_x = 2.6, n=1310 and for the alternative we select < \mu_o. Then press Calculate.

And we got the same results.  

3 0
2 years ago
I ONLY HAVE A LITTLE TIME ANS NEED HELP!!!!! can someone explain this to me
denpristay [2]

Answer:

x = 92

Step-by-step explanation:

\frac{x}{46} =\frac{78}{39}

I did big side over small side, proportions.

Cross Multiply.

39x = 3,588

divide by 39x

x = 92

4 0
3 years ago
Read 2 more answers
How do i factorize x2+14x+49
Fed [463]

Answer:

(x + 7) (x + 7)

Step-by-step explanation:

What's the square root of x^2?

That's x

What's the square root of 49

That's 7

And what makes 14?

7 + 7 = 14

So therefore the answer is (x + 7) (x + 7)

Easy Kevin Durant is so smart!

4 0
2 years ago
Read 2 more answers
Please someone help me in this
Elis [28]

Answer:

20 watches were made.

Step-by-step explanation:

385=15n+85

300=15n

20=n

7 0
3 years ago
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How online school? mines/ I don’t like it my grades are going down
Korvikt [17]

Answer:

I hope it gets easier for you :)

4 0
3 years ago
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