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Sati [7]
3 years ago
9

A prism is completely filled with 576 cubes that have edge length of 1/4 in.

Mathematics
2 answers:
guajiro [1.7K]3 years ago
6 0
According to my test it is 9 so it should be right
tester [92]3 years ago
5 0
9 is correct answer hope I helped;3
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Step-by-step explanation:

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2^9.......…………………dhdjbfjfdkdvxkkffhkgbfjfufufng

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The mean age when smokers first start is 13 years old with a population standard deviation of 2 years. A researcher thinks that
lakkis [162]

Answer:

Null hypothesis:\mu = 13  

Alternative hypothesis:\mu \neq 13

z=\frac{12.2-13}{\frac{2}{\sqrt{30}}}=-2.191  

a. Reject the null hypothesis

c. There is enough evidence to support the claim

Step-by-step explanation:

Data given and notation  

\bar X=12/2 represent the sample mean  

s=20000 represent the standard deviation for the sample  

\sigma =2 represent the population standard deviation

n=30 sample size  

\mu_o =13 represent the value that we want to test  

\alpha=0.05 represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses to be tested  

We need to conduct a hypothesis in order to determine if the smoking age has significantly changed since the invention of ENDS—electronic nicotine delivery systems, the system of hypothesis would be:  

Null hypothesis:\mu = 13  

Alternative hypothesis:\mu \neq 13

Compute the test statistic

We know the population deviation, so for this case is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

We can replace in formula (1) the info given like this:  

z=\frac{12.2-13}{\frac{2}{\sqrt{30}}}=-2.191  

What do you conclude? Using the p-value approach  

Since is a two tailed test the p value would be:  

p_v =2*P(Z  

Since the p_v then the correct decision is:

a. Reject the null hypothesis

And the best conclusion is :

c. There is enough evidence to support the claim

6 0
3 years ago
Help !!!!!!!!!!!!!!! Thanks
Alexus [3.1K]

Answer:

I believe that the value of the variable is C: 50.

And Y = 180 - 50 = 130.

Good Luck!

5 0
3 years ago
PLEASE HELP !! ILL GIVE BRAINLIEST !!
nirvana33 [79]

Answer:

<KLN and <MLI

Step-by-step explanation:

vertical angles are made by opposite angles that are made by two intersecting lines

hope this helps :), brainliest??

8 0
3 years ago
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