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iragen [17]
3 years ago
9

Look at the picture for the question 10 points will mark brainilest

Mathematics
2 answers:
Phantasy [73]3 years ago
7 0

Answer:

B

Step-by-step explanation:

accidentally commented

natima [27]3 years ago
4 0

Answer:

you want to have an answer to the question do you, i wish i could help but im only here for my answers

Step-by-step explanation:

sorry

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A random sample of 81 automobiles traveling on a section of an interstate showed an average speed of 60 mph. The distribution of
myrzilka [38]

Answer:

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

X \sim N(60,13.5)  

Where \mu=60 and \sigma=13.5

And for this case we select a sample size of n= 81. 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}})

And the standard error of the mean would be:

\sigma_{\bar X} =\frac{13.5}{\sqrt{81}}= 1.5

4.1.5

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 distribution for X is given by:

X \sim N(60,13.5)  

Where \mu=60 and \sigma=13.5

And for this case we select a sample size of n= 81. 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}})

And the standard error of the mean would be:

\sigma_{\bar X} =\frac{13.5}{\sqrt{81}}= 1.5

4.1.5

7 0
3 years ago
How do you simplify this?? If you can! Plz answer
Volgvan
Divide them both by 2 and then see what u get. How do you take a picture of your homework?
5 0
3 years ago
The positions of two divers from the water’s surface after a dive are shown:
Travka [436]

Answer:

Step-by-step explanation:

the 4 one

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Graph the equation on the coordinate plane y= -3/4+1
musickatia [10]

Answer:

OMG IS THAT PROBABILITY ON A GRAPH THOUGH PLEASE REPLY SO I COULD ANSWER...

Step-by-step explanation:

6 0
3 years ago
7.1 + 16.04 – .2 = ?
skad [1K]
The answer is 22.94 because of reasons and math and decimals and stuffy I'm not going to go in to detail somebody else can because I'm not with the math stuff
8 0
3 years ago
Read 2 more answers
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