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2 years ago

Is the following relation a function? Yes or no

Mathematics

1 answer:

KatRina [158]2 years ago

4 0

Answer:

yes

Step-by-step explanation:

This is a function. Each input goes to only 1 output

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4. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. In a

borishaifa [10]

675 people will have score between 85 and 120

Step-by-step explanation:

Given

Mean = 100

SD = 15

If we have to find percentage of score between two values we have to find the z-score for both values and then area under the curve for both values

z-score is given by:

for a value x:

$z-score = \frac{x-mean}{SD}$

So,

For 85:

$z-score = z_1 = \frac{85-mean}{SD}\\ = \frac{85-100}{15}\\=\frac{-15}{15}\\=-1$

$z-score = z_2 = \frac{120-mean}{SD}\\ = \frac{120-100}{15}\\=\frac{20}{15}\\=1.3333$

Now we have to find the area under the curve for both values of z-score. z-score tables are used for this purpose.

So,

For z1 : 0.1587

For z2: 0.9082

The area between z11 and z2:

$z_2-z_1 = 0.9082-0.1587=0.7495$

So the probability of score between 85 and 120 is 0.7495

As the sample is of 900 people, the people with scores between 85 and 120 will be:

900*0.7495 = 674.55 people

Rounding off to nearest whole number

675 people will have score between 85 and 120

Keywords: Probability, SD

Learn more about probability at:

#LearnwithBrainly

4 0

3 years ago

Chose all the properties that were used to simplify the following problem

timofeeve [1]

(a+b) + c = a + (b + c)

re-arrange the numbers - associative property of addition

Answer

Associative property of addition

6 0

2 years ago

Write an equation to represent the situation below. Then explain what each part of the equation represents (the variables, the c

gizmo_the_mogwai [7]

Yes i do see this yes

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2 years ago

if you have a net spendable income of $1,450 per month, what is the maximum amount of money you should spend on food each month

frutty [35]

Answer:

The maximum amount of money that should be spent on housing each month is $522.

The maximum amount of money that should be spent on transportation each month is $290.

The maximum amount of money that should be spent on food each month is $246.50.

The maximum amount of money that should be spent on entertainment each month is $116.

7 0

3 years ago

At the beginning of the month a store had a balance of −$554. During the month the store lost another $600. What is the current

musickatia [10]

When subtracting a number from a negative number the number appears to get larger, but in fact only becomes smaller. - 554 - 600 = - $1154

4 0

3 years ago

Read 2 more answers