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2 years ago

Can someone plz help me with this one problem plz!!!

Mathematics

1 answer:

Reil [10]2 years ago

3 0

Its not plug the x coordinate in for x and the y for y and see if they equal each other

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The mean student loan debt for college graduates in Illinois is $30000 with a standard deviation of $9000. Suppose a random samp

Nataly [62]

Answer:

the probability that the mean student loan debt for these people is between $31000 and $33000 is 0.1331

Step-by-step explanation:

Given that:

Mean = 30000

Standard deviation = 9000

sample size = 100

The probability that the mean student loan debt for these people is between $31000 and $33000 can be computed as:

$P(31000 < X < 33000) = P( X \leq 33000) - P (X \leq 31000)$

$P(31000 < X < 33000) = P( \dfrac{X - 30000}{\dfrac{\sigma}{\sqrt{n}}} \leq \dfrac{33000 - 30000}{\dfrac{9000}{\sqrt{100}}} )- P( \dfrac{X - 30000}{\dfrac{\sigma}{\sqrt{n}}} \leq \dfrac{31000 - 30000}{\dfrac{9000}{\sqrt{100}}} )$

$P(31000 < X < 33000) = P( Z \leq \dfrac{33000 - 30000}{\dfrac{9000}{\sqrt{100}}} )- P(Z \leq \dfrac{31000 - 30000}{\dfrac{9000}{\sqrt{100}}} )$

$P(31000 < X < 33000) = P( Z \leq \dfrac{3000}{\dfrac{9000}{10}}}) -P(Z \leq \dfrac{1000}{\dfrac{9000}{10}}})$

$P(31000 < X < 33000) = P( Z \leq 3.33)-P(Z \leq 1.11})$

From Z tables:

$P(31000 < X$

Therefore; the probability that the mean student loan debt for these people is between $31000 and $33000 is 0.1331

8 0

2 years ago

URGENT HOW MANY STUDENTS SPEAK SPANISH? and it isn’t 14 I tried that and it was wrong

Ray Of Light [21]

Answer:

46 students

Step-by-step explanation:

Brainliest pls? hope it helps :)

Have a good day/night

3 0

3 years ago

Rewrite this polynomial in STANDARD FORM:<br>5x-10x^2+8x^3

Ainat [17]

Answer:

$8 {x}^{3} - 10 {x}^{2} + 5x$

Step-by-step explanation:

$5x - 10 {x}^{2} + 8 {x}^{3} \\ \red{ \bold{= 8 {x}^{3} - 10 {x}^{2} + 5x}} \\ is \: in \: the \: standard \: form \\$

4 0

2 years ago

The winner of a gymnastics competition scored a total of 22.1 points. She won by 0.676 points.

weqwewe [10]

Answer:

21.424

Step-by-step explanation:

22.1 - 0.676 = 21.424

im not sure if it is correct but i think its like this

7 0

3 years ago

4 friends share 5 pizzas equally how much pizza did each friend get

stira [4]

Answer:

Step-by-step explanation:

deoends how many pieces each pizza has. if it has 8 pieces each it would be 8×5=40

8 0

2 years ago