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PilotLPTM [1.2K]
2 years ago
5

My grade is a 51.84% if an assignment is 40 points and I get all the points what my new grade?

Mathematics
1 answer:
d1i1m1o1n [39]2 years ago
6 0

Answer:75.92%

Step-by-step explanation:51.84% + 100%= 151.84% divided by 2= 75.92%

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The average weight of a chicken egg is 2.25 ounces with a standard deviation of 0.2 ounces. You take a random sample of a dozen
n200080 [17]

Answer:

P(\bar X

P(\bar X

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".  

Let X the random variable that represent interest on this case, and for this case we know the distribution for X is given by:

X \sim N(\mu,\sigma)  

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

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

On this case  \bar X \sim N(2.25,\frac{0.2}{\sqrt{12}})

Solution to the problem

We want this probability:

P(\bar X

The best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we apply this formula to our probability we got this:

P(\bar X

P(\bar X

5 0
3 years ago
Line d is parallel to line c in the figure below Which statements about the figure are true? Select three options
Marianna [84]
Line d and c are bother parallel but the three options would be them
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3 years ago
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Answer:

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Step-by-step explanation:

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I think you meant "y = 4 arccot (x)."  

This is equivalent to:

 y
---- = arccot x
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and so cot (y/4) = x
8 0
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