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kondaur [170]
3 years ago
11

A study concludes that 15 percent of all college students attend a gym class. Which of the following statements is true? 15 perc

ent is a parameter. 15 percent is an ordinal measurement. 15 percent is a statistic. 15 percent is categorical data.
Mathematics
2 answers:
yanalaym [24]3 years ago
4 0
I think it is 15 percent is a statistic.
I am not 100% sure if it is right or not but I hope it helps!
vladimir1956 [14]3 years ago
4 0

we are given

A study concludes that 15 percent of all college students attend a gym class

we will check each options

option-A:

15 percent is a parameter

we know that

15% is a constant

so, this is not parameter

so, this is FALSE

option-B:

15 percent is an ordinal measurement

we know that

15 % is a ratios

so, it can not be measurement

so, this is FALSE

option-D:

15 percent is a statistic

this is TRUE

option-E:

15 percent is categorical data

15% is a ratio

so, this is FALSE



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Help with 21 would be much appreciated.
umka2103 [35]

Answer:

\large\boxed{x=2\sqrt{21}\ and\ y=4\sqrt3}

Step-by-step explanation:

Look at the picture.

ΔADC and ΔCDB are similar. Therefore the sides are in proportion:

\dfrac{AD}{CD}=\dfrac{CD}{DB}

We have

AD=14-8=6\\CD=y\\DB=8

Substitute:

\dfrac{6}{y}=\dfrac{y}{8}         <em>cross multiply</em>

y^2=(6)(8)

y^2=48\to y=\sqrt{48}\\\\y=\sqrt{16\cdot3}\\\\y=\sqrt{16}\ cdot\sqrt3\\\\\boxed{y=4\sqrt3}

For x use the Pythagorean theorem:

x^2=6^2+(4\sqrt3)^2\\\\x^2=36+48\\\\x^2=84\to x=\sqrt{84}\\\\x=\sqrt{4\cdot21}\\\\x=\sqrt4\cdot\sqrt{21}\\\\\boxed{x=2\sqrt{21}}

3 0
3 years ago
What is the measure of angle c?​
s344n2d4d5 [400]

Answer:

50 degrees

Step-by-step explanation:

Okay! So first off, because this is NOT a right triangle, we can't use soh cah toa. That means we can either use the law of sines or the law of cosines.

Because we only have sides here and no angles, we are forced to use the law of cosines.

c^2 = a^2 + b^2 − 2ab cos(C)

c = 6

b = 7.5

a = 6.5

36 = 6.5^2 + 7.5^2 - 2(6.5)(7.5)cos(C)

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-62.5 = -97.5cos(C)

0.641 = cos(C)

angle C = cos^-1(0.641)

angle C = 50.13 which is around 50 degrees

Remember! A dumb thing i always used to do in geometry was use radians instead of degrees, be sure to use degrees here because you are looking for degrees. Radians are for things involving not degrees, but PI.

5 0
3 years ago
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bulgar [2K]

Answer:

16

Step-by-step explanation:

Inverse variation is of the form

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xy = 128

Let x = 8

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Divide each side by 8

8y/8 = 128/8

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6 0
3 years ago
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