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2 years ago

What is the mean score of the vaulter?

Mathematics

2 answers:

dsp732 years ago

6 0

~Hello There!~

6.856 + 7.923 + 8.135 = 22.914
22.914/3 = 7.638 <=== Mean score

Hope This Helps You!
Good Luck :)
Have A Great Day ^_^

- Hannah ❤

Zolol [24]2 years ago

6 0

To find the mean score, add all the numbers together and divide by the amount of numbers there is.

6.856 + 7.923 + 8.135 = 22.914

Divide 22.914 by 3

22.914/3 = 7.638

7.638 is your answer

hope this helps

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What value does the 6 represent in the number 240.65

Kobotan [32]

Answer:

000.60

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2 years ago

High school students across the nation compete in a financial capability challenge each year by taking a National Financial Capa

zalisa [80]

Answer:

The students have to score 0.74 standard deviations above the mean to be publicly recognized.

Step-by-step explanation:

A random variable X is said to have a normal distribution with parameters µ (mean) and σ² (variance).

If $X \sim N (\mu, \sigma^{2})$ , then $z=\frac{X-\mu}{\sigma}$ , is a standard normal variate with mean, E (Z) = 0 and Var (Z) = 1. That is, $Z \sim N (0, 1)$ .

The distribution of these z-scores is known as the standard normal distribution.

The z-score is a standardized form of the raw score, X. It is a numerical measurement of the relationship between a value (X) and the mean (µ) in terms of the standard deviation (σ). A z-score of -1 implies that the data value is 1 standard deviation below the mean. And a z-score of 1 implies that the data value is 1 standard deviation above the mean.

Let X be defined as the scores of students at the National Financial Capability Challenge Exam.

It is provided that the students who score in the top 23% are recognized publicly for their achievement by the Department of the Treasury.

That is, P (X > x) = 0.23.

⇒ $P(\frac{X-\mu}{\sigma}>\frac{x-\mu}{\sigma})=0.23$

⇒

$P(Z>z)=0.23\\1-P(Z$

The value of z for this probability value is:

z = 0.74.

*Use a z-table.

Thus, the students have to score 0.74 standard deviations above the mean to be publicly recognized.

8 0

2 years ago

Jimmy went to the toy store. He saw 23 wooden trains and 41 plastic trains.how many more plastic trains than wooden trains did h

joja [24]

To find out d answer to dis we need to subtract d amount of plastic trains by d amount of wooden trains. d answer will be d answer to your question. lets do it:-

41 - 23 = 18
Jimmy sees 18 more plastic trains than wooden trains.

CHECK OUR WORK:-

18 + 23 = 41
We were RIGHT!!

So, Jimmy sees 18 more plastic trains than wooden trains.

Hope I helped ya!! xD

7 0

2 years ago

Read 2 more answers

What are the solutions of the equation x4 + 3x2 + 2 = 0? Use u substitution to solve.

babymother [125]

We can use t=x^2 to solve this
Once we do that we will have simple square equation which we know how to solve.

t^2 + 3t + 2 = 0

t1 = -1
t2 = -2

x1 = √-1 = i
x2 = -i

x3 = √-2 = i√2
x4 = -i√2

Make sure you know that i^2 = -1 and (-i)^2 = -1 which gives us solutions we got...

3 0

2 years ago

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Alchen [17]

Answer: C)27:1

Step-by-step explanation:

Given, Kent has two similar cylindrical pipes, Pipe A and Pipe B. The radius of Pipe A is 6 cm, and the radius of Pipe B is 2 cm.

Volume of cylinder = $\pi r^2h$ , where r= radius and h = height.

Also, If two figures are similar then ratio of volume is equal to the cube of any dimension .

The ratio of the volume of Pipe A to the volume of Pipe B is given by :-

$\dfrac{\text{Volume of pipe A}}{\text{Volume of pipe B}}=\dfrac{6^3}{2^3}\\\\=\dfrac{216}{8}=\dfrac{27}{1}$

Thus, the ratio of the volume of Pipe A to the volume of Pipe B = 27:1

So, the correct option is C)27:1.

7 0

2 years ago