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AfilCa [17]
3 years ago
12

Explain the difference between a simple random sample and a systematic sample.

Mathematics
1 answer:
Stells [14]3 years ago
5 0

Answer:

C

Step-by-step explanation:

Simple random sampling otherwise called probability sampling involves selecting a subset of a part of a population in which each member of the population has equal chances of being selected while systematic sampling involves the use of sampling interval which is determined by dividing the population by the sample size and a random starting point is selected. for example let say we have a population of 1000 people and we want to systematically select 50 people, 1000 /  50 = 20, it means after choosing a random starting point, we select every 20th person after the starting point until the desire sample size has been attained.

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Determine the equation of the line that goes through the points (-2, 1) and (1, -1).
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Answer:(2,3)

Step-by-step explanation:

y2-y1/x2-x1

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3 years ago
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Line m has the equation y = 1/2x - 4
Mandarinka [93]

Answer:

  • As the slopes of both lines 'm' and 'n' are the same.

Therefore, we conclude that the equation x-2y=4 represents the equation of the line 'n' if lines m and n are parallel to each other.

Step-by-step explanation:

We know that the slope-intercept of line equation is  

y=mx+b

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Given the equation of the line m

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comparing with the slope-intercept form of the line equation

y  = mx + b

Therefore,

The slope of line 'm' will be = 1/2

We know that parallel lines have the 'same slopes, thus the slope of the line 'n' must be also the same i.e. 1/2

Checking the equation of the line 'n'

x-2y=4

solving for y to writing the equation in the slope-intercept form and determining the slope

x-2y=4

Add -x to both sides.

x - 2y + (-x) = 4+(-x)

-2y = 4 - x

Divide both sides by -2

\frac{-2y}{-2}=\frac{-x+4}{-2}

y=\frac{1}{2}x-2

comparing ith the slope-intercept form of the line equation

Thus, the slope of the line 'n' will be: 1/2

  • As the slopes of both lines 'm' and 'n' are the same.

Therefore, we conclude that the equation x-2y=4 represents the equation of the line 'n' if lines m and n are parallel to each other.

3 0
2 years ago
What's the factor of 30 and the sum of 11
kari74 [83]

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Step-by-step explanation:

Explained already by another user

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3 years ago
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Step-by-step explanation:

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Cody made deposits of $45, $18 and $26 into his checking account. He then wrote checks for $21 and $93. Write and solve a numeri
Lera25 [3.4K]
$45+$18+$26-$21-$93
45+18=63
63+18=81
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3 years ago
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