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quester [9]
2 years ago
14

Select the correct answer.

Mathematics
1 answer:
Tasya [4]2 years ago
3 0
A a certicle coalition
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If the distribution is really N ( 5.43 , 0.54 ) , N(5.43,0.54), what proportion of observations would be less than 5.05 ? 5.05?
Ipatiy [6.2K]

Answer:

P(X

And we can use the following excel code to find the answer: "=NORM.DIST(-0.704,0,1,TRUE)"

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

X \sim N(5.43,0.54)  

Where \mu=5.43 and \sigma=0.54

We are interested on this probability

P(X

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

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

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

P(X

And we can find this probability on this way:

P(Z

And we can use the following excel code to find the answer: "=NORM.DIST(-0.704,0,1,TRUE)"

6 0
3 years ago
Consider the equation 360=__+84. Use the bar diagram to represent the equation. Then solve for the unknown value.
Andreyy89

Answer:

the answeris 276. 276+84=360.

Step-by-step explanation:

you would subtract 84 from 360 and then you have your answer!!

5 0
3 years ago
What is the approximate area of the circle shown below?<br> ???? Help ???
PIT_PIT [208]

Answer:

D. 1662 cm

Step-by-step explanation:

A=πr2=π•23≈1661.90251cm²

which is 1661.9

but of course you have to round up for 1662 cm :)

7 0
2 years ago
Find the value of b if the following figures are similar.​
chubhunter [2.5K]

Answer:

7

Step-by-step explanation:

20 - 12 = 8

15 - b = 8

-b = 8 - 15

b = 7 ( -ve signs will become +ve)

3 0
3 years ago
Read 2 more answers
Does this graph show a function? Explain how you know.
NISA [10]

Answer:

its A.

Step-by-step explanation:

nun of the lines touch.

3 0
2 years ago
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