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Ira Lisetskai [31]
3 years ago
8

Point , j located at (2,7) is rotated 90° counterclockwise about (-1,-3). What is the y- coordinate of 1'? А 9 B 0 C -11 D-9​

Mathematics
1 answer:
arlik [135]3 years ago
4 0

Answer: the answer is 0

Step-by-step explanation:

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The Miller family consumes 20 jugs of milk in 4 weeks how much milk will be consumed in 8 weeks?
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How to do geometry proofs for slow students?
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7 0
3 years ago
Determine mu Subscript x overbar and sigma Subscript x overbar from the given parameters of the population and the sample size.
pentagon [3]

Answer:

\bar X= \mu = 25

\sigma_{\bar X}= \frac{7}{\sqrt{15}}= 1.807

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the variable of interest of a population, and for this case we know the following conditions

Where \mu=25 and \sigma=7

And for this case we select a sample size of n= 15. and we want to know the distribution for the sample mean \bar X. We can assume that the distribution for \bar X is approximately normal and given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

Asuming that the distribution for X is also approximately normal. So then the parameters are:

\bar X= \mu = 25

\sigma_{\bar X}= \frac{7}{\sqrt{15}}= 1.807

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A number decreased by 16 is -3
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Just add 16 to -3, then that will get your answer 13.
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