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rosijanka [135]
3 years ago
5

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. If a certain statistician has an of 122 ,

what percent of the population has a lower IQ?
A. 47%
B. 93%
C. 22%
D. 99%
E. 7%
Mathematics
1 answer:
marusya05 [52]3 years ago
7 0

Answer:

B. 93%

Step-by-step explanation:

Find the z-score:

z = (x − μ) / σ

z = (122 − 100) / 15

z = 1.47

Find the probability using a calculator or z-score table.

P(Z < 1.47) = 0.93

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-7x + 13 > 41

- 13

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x < -4

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7 0
3 years ago
5(x+3)-5<br> simplify this.
nignag [31]

Answer:

5x+10

Step-by-step explanation:

Distribute:

=(5)(x)+(5)(3)+−5

=5x+15+−5

Combine Like Terms:

=5x+15+−5

=(5x)+(15+−5)

=5x+10

8 0
3 years ago
I need help on this.
andrew11 [14]

To find the midpoint, add x1 and x2 then divide by 2, then add y1 and y2 and divide by 2.


Midpoint = (2a +2b /2 , 0 + 2c /2)


Midpoint = a+b, c


3 0
3 years ago
Someone please solve x for me
Airida [17]

Answer:

x = 20

Step-by-step explanation:

added together, the angles make 180

3x + 80 + 2x = 180

subtract 80 from both sides of the equation

3x + 80 - 80 + 2x = 180 - 80

combine like terms

5x = 100

divide both sides by 5

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3 0
3 years ago
In constructing a box-and-whisker plot from a data set, which values are at the ends of the box?
I am Lyosha [343]

Answer:  In constructing a box-and-whisker plot from a data set,  the minimum and maximum values are at the ends of the box.


Step-by-step explanation:

A box and whisker plot displays the five measures of data. The five measures summary is the minimum, first quartile, median, third quartile, and maximum. In a box plot, we draw a box from the first quartile to the third quartile.

Therefore, In constructing a box-and-whisker plot from a data set,  the minimum and maximum values are at the ends of the box.

Hence, A is the right option,

8 0
3 years ago
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