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Alexeev081 [22]
3 years ago
14

A researcher posts a radio advertisement offering $35 in exchange for participation in a short study. The researcher accepts the

first eight people who respond to the advertisement. Which of the following statements is true about the sample? (5 points) a It is a valid sample because the first eight people were selected to participate. b It is not a valid sample because it is not a random sample of the population. c It is a valid sample because money was offered to participants. d It is not a valid sample because it is only a short study.
Mathematics
1 answer:
Mariulka [41]3 years ago
7 0
B) not valid because it is not a random sample

a) is biased because the first 8 people are unlikely to be representative of the population
c) is biased as offering money will influence the people who reply
d) is untrue because short studies are valid if they are representative
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3 years ago
Read 2 more answers
Which equation represents a line which is perpendicular to the line 5x + 2y = 12?
o-na [289]

Answer:

<h2>          y = ²/₅ x - 3</h2>

Step-by-step explanation:

Changing to slope-intercept form:

5x + 2y = 12         {subtract 5x from both sides}

2y = -5x + 12         {divide both sides by 2}

y = -⁵/₂ x + 6

y=m₁x+b₁   ⊥   y=m₂x+b₂   ⇔    m₁×m₂ = -1

{Two lines are perpendicular if the product of theirs slopes is equal -1}

y =-⁵/₂ x + 1    ⇒     m₁ =  -⁵/₂

-⁵/₂× m₂ = -1      ⇒   m₂ = ²/₅

So, any line perpendicular to 5x + 2y = 12 must have slope m =²/₅

7 0
2 years ago
A cylinder has a radius of 6 inches and a height of 2 feet. Which of the following should be done first in order to find the vol
zvonat [6]
The significant components, the radius and the height, are in inches and feet respectively, you'd need to convert them both to the same unit, whichever it may be, meters or feet or inches or millimeters, so long is the same, then use the volume of a cylinder equation to get it.
7 0
3 years ago
When a fraction of 12 is taken away from 17, what remain exceed one-third of seventeen by six.
vova2212 [387]
X - the fraction

17- 12x=\frac{1}{3} \times 17+6 \\&#10;17-12x=\frac{17}{3}+6 \\&#10;-12x=\frac{17}{3}+6-17 \\&#10;-12x=\frac{17}{3}-11 \\&#10;-12x=\frac{17}{3}-\frac{33}{3} \\&#10;-12x=-\frac{16}{3} \\&#10;x=-\frac{16}{3} \times (-\frac{1}{12}) \\&#10;x=\frac{16}{36} \\&#10;x=\frac{4}{9}

The fraction is 4/9.
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3 years ago
Decide which of the following numbers does not belong in the group.
scoundrel [369]

Answer:

502

Step-by-step explanation

108 has the numbers 0, 1, and 8 which added together totals 9

603 has the numbers 0, 3, and 6 which added together totals 9

360 has the numbers 0, 3, and 6 which added together totals 9

502 has the numbers 0, 2, and 5 which equal 7

502 is the odd one out

7 0
3 years ago
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