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Sunny_sXe [5.5K]

3 years ago

9

Suppose a population contains 80,000 people. All else being equal, a study based on a population sample that includes which of t

he following numbers of respondents would be the most reliable?
A.8000
B.8
C.800
D.80

2 answers:

Helga [31]3 years ago

6 0

I'd say A. 8000, because you'd get the most answers and the biggest variety in answers for a more accurate sample.

Aleksandr-060686 [28]3 years ago

4 0

Answer: A.8000

Step-by-step explanation:

In statistics , the largest possible sample gives the most reliable results.

[ Since a large sample could have more variation as compare to the small sample.]

Given : A a population contains 80,000 people.

All else being equal, a study based on a population sample that includes .

Given sample sizes : A.8000 B.8 C.800 D.80

Clearly 8000 is the largest number .

It means numbers of respondents would be the most reliable = 8000

Hence, A is the correct answer.

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Write the name (not the equation) of each of the following:

Vladimir [108]

The names of the functions in the attached figure are:

Cubic function
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<h3>How to name the functions?</h3>

Functions can be named by their parent functions.

This is so because functions derive their properties from their parent functions.

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Linear equation
Exponential equation
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Using the above as a guide, the names of the functions in the attached figure are:

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2 years ago

SOMEONE HELP MEEEEEE 75 POINTS TO THE PERSON THAT HELPS

Tresset [83]

Answer:

Part 1) $9x-7y=-25$

Part 2) $2x-y=2$

Part 3) $x+8y=22$

Part 4) $x+8y=35$

Part 5) $3x-4y=2$

Part 6) $10x+6y=39$

Part 7) $x-5y=-6$

Part 8)

case A) The equation of the diagonal AC is $x+y=0$

case B) The equation of the diagonal BD is $x-y=0$

Step-by-step explanation:

Part 1)

step 1

Find the midpoint

The formula to calculate the midpoint between two points is equal to

$M=(\frac{x1+x2}{2},\frac{y1+y2}{2})$

substitute the values

$M=(\frac{2-6}{2},\frac{-3+5}{2})$

$M=(-2,1)$

step 2

The equation of the line into point slope form is equal to

$y-1=\frac{9}{7}(x+2)\\ \\y=\frac{9}{7}x+\frac{18}{7}+1\\ \\y=\frac{9}{7}x+\frac{25}{7}$

step 3

Convert to standard form

Remember that the equation of the line into standard form is equal to

$Ax+By=C$

where

A is a positive integer, and B, and C are integers

$y=\frac{9}{7}x+\frac{25}{7}$

Multiply by 7 both sides

$7y=9x+25$

$9x-7y=-25$

Part 2)

step 1

Find the midpoint

The formula to calculate the midpoint between two points is equal to

$M=(\frac{x1+x2}{2},\frac{y1+y2}{2})$

substitute the values

$M=(\frac{1+5}{2},\frac{0-2}{2})$

$M=(3,-1)$

step 2

Find the slope

The slope between two points is equal to

$m=\frac{-2-0}{5-1}=-\frac{1}{2}$

step 3

we know that

If two lines are perpendicular, then the product of their slopes is equal to -1

Find the slope of the line perpendicular to the segment joining the given points

$m1=-\frac{1}{2}$

$m1*m2=-1$

therefore

$m2=2$

step 4

The equation of the line into point slope form is equal to

$y-y1=m(x-x1)$

we have

$m=2$ and point $(1,0)$

$y-0=2(x-1)\\ \\y=2x-2$

step 5

Convert to standard form

Remember that the equation of the line into standard form is equal to

$Ax+By=C$

where

A is a positive integer, and B, and C are integers

$y=2x-2$

$2x-y=2$

Part 3)

In this problem AB and BC are the legs of the right triangle (plot the figure)

step 1

Find the midpoint AB

$M1=(\frac{-5+1}{2},\frac{5+1}{2})$

$M1=(-2,3)$

step 2

Find the midpoint BC

$M2=(\frac{1+3}{2},\frac{1+4}{2})$

$M2=(2,2.5)$

step 3

Find the slope M1M2

The slope between two points is equal to

$m=\frac{2.5-3}{2+2}=-\frac{1}{8}$

step 4

The equation of the line into point slope form is equal to

$y-y1=m(x-x1)$

we have

$m=-\frac{1}{8}$ and point $(-2,3)$

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step 5

Convert to standard form

Remember that the equation of the line into standard form is equal to

$Ax+By=C$

where

A is a positive integer, and B, and C are integers

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Part 4)

In this problem the hypotenuse is AC (plot the figure)

step 1

Find the slope AC

The slope between two points is equal to

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step 2

The equation of the line into point slope form is equal to

$y-y1=m(x-x1)$

we have

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step 3

Convert to standard form

Remember that the equation of the line into standard form is equal to

$Ax+By=C$

where

A is a positive integer, and B, and C are integers

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Part 5)

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step 1

Find the slope BD

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step 2

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step 3

Convert to standard form

Remember that the equation of the line into standard form is equal to

$Ax+By=C$

where

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Note The complete answers in the attached file

3 0

3 years ago

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Answer:

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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6 0

3 years ago