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IgorC [24]
3 years ago
6

If a triangle has one angle of 79 and a second angle of 58, what are the measures of angles 1 and 2

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
6 0
The answer is A for apex
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What is the length of AB?
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A researcher conducting a telephone survey is concerned about possible sources of bias. Of the following, which is the best exam
Alex_Xolod [135]

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C. Many of the people selected to participate in the survey who do not respond might have opinions different from those who do respond.

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The survey is said to be biased by non-response survey if many people did not respond to the survey this might be much affected the result of survey.

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3 years ago
Professor Elderman has given the same multiple-choice final exam in his Principles of Microeconomics class for many years. After
bearhunter [10]

Answer:

P(\bar X

And we can use the following z score:

z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And replacing we got using the normal standard distribution table or excel:

P(\bar X

C.0.8413

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 records of a population, and for this case we know the distribution for X is given by:

X \sim N(76,12)  

Where \mu=76 and \sigma=12

Since the distribution for X is normal then we know that the distribution for the sample mean \bar X is given by:

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

We select a sample of size n=36, and we want to calculate this probability:

P(\bar X

And we can use the following z score:

z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And replacing we got using the normal standard distribution table or excel:

P(\bar X

C.0.8413

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3 years ago
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This answer pls help
serg [7]
12 I think? I’m just guessing sorry.
6 0
3 years ago
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