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tangare [24]
2 years ago
8

Guys, Take a look at the screenshot below, do you understand this problem? If you do so, please tell me the answer!

Mathematics
2 answers:
NISA [10]2 years ago
8 0

Answer:

there is no screenshot or I just can't see it

ANEK [815]2 years ago
7 0
There’s no screenshot srry
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A survey among students at a certain university revealed that the number of hours spent studying the week before final exams was
Rainbow [258]

Answer:

P(25

And we can find this probability with this difference:

P(0

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.  

P(0

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 hous spent studying the week before final exams of a population, and for this case we know the distribution for X is given by:

X \sim N(25,6)  

Where \mu=25 and \sigma=6

We are interested on this probability

P(25

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(25

And we can find this probability with this difference:

P(0

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.  

P(0

6 0
2 years ago
For a pyramid S.ABC of volume V. Let M be a point on side AB such that AM/AB = x. The plane (alpha) through M is parallel to two
Doss [256]

Answer:

Can't understand your question

4 0
2 years ago
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HELPPP Paul is making two ceramic plates in his pottery class. One plate has a 20-centimeter diameter and a 62.8-centimeter circ
nikitadnepr [17]

Answer:

It’s 2+2=x 3x3=18 that’s the answer

Step-by-step explanation:

5 0
3 years ago
How to solve, -1.2x - 6.5x less than or equal to 2.3x + 5
Hitman42 [59]

-1.2x - 6.5x ≤ 2.3x + 5

-7.7x ≤ 2.3x + 5

≤ 10x + 5

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4 0
2 years ago
What is they sum of 8/10 and 2/100
o-na [289]
8/10 + 2/100 = 80/100 + 2/100 = 82/100.

Hope this helps !

Photon
3 0
3 years ago
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