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Lubov Fominskaja [6]
3 years ago
12

A television news program asks its viewers to call in to give their opinions on an upcoming ballot question. What type of sampli

ng method does this represent?
Mathematics
1 answer:
Alla [95]3 years ago
4 0

Answer:

This is an example of self selecting sampling

Step-by-step explanation:

This is an example of self selecting sampling because the news program is asking viewed to give their opinions. The viewers themselves have a choice of participating in the sample therefore is self selecting.

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the mean age of three people is 22 and their median age is 20. the range of their ages is 16. how old is each person?
Andrej [43]
The second person must be 20 years old, since that is the median of the ages.
If the mean is 22 years, then the sum when all three added together is 66.
That means, the youngest and the oldest add up to 46 years old.

Let the oldest be x + 16, then the youngest must be x.
x + 16 + x = 46
2x + 16 = 46
2x = 30
x = 15

Since the youngest person is 15, the oldest must be 31.

Hence, the ages, from youngest to oldest, are: 15, 20, 31
4 0
3 years ago
A person casts a shadow that aligns with a shadow of a tree. the person is 5.5 feet tall and casts a shadow 8.25 feet long. the
SOVA2 [1]

An equation that can be used to determine the tree's height is 22.5/8.25 = x/5.5.

The height of this tree is equal to 15 feet.

The distance of this person from the tree is equal to 14.25 feet.

<h3>What are the properties of similar triangles?</h3>

In Geometry, two (2) triangles are similar when the ratio of their corresponding sides are equal in magnitude and their corresponding angles are congruent.

Additionally, two (2) geometric figures are considered to be congruent only when their corresponding side lengths are congruent and the magnitude of their angles are congruent.

Now, we can write an equation that can be used to determine the tree's height. Since the ratio of the corresponding sides of similar triangles are equal in magnitude, we have the following mathematical expression (equation):

22.5/8.25 = x/5.5

Where:

x represents the height of the tree.

<h3>How tall is the tree?</h3>

22.5/8.25 = x/5.5

Cross-multiplying, we have:

8.25x = 22.5 × 5.5

8.25x = 123.75

x = 123.75/8.25

x = 15 feet.

<h3>How far is the person standing from the tree?</h3>

The distance of this person from the tree can be calculated as follows;

Distance = Length of tree's shadow - Length of person's shadow

Distance = 22.5 - 8.25

Distance = 14.25 feet.

Read more on corresponding side here: brainly.com/question/11920446

#SPJ1

7 0
1 year ago
Winnie wrote the following riddle.I am a number between 60 and 100.My ones digit is two less than my tens digit.I am a prime num
Kazeer [188]

Answer:

79

Step-by-step explanation:

60<xy<100

y -2 =x


if it is prime

y cannot be even

so y could be      1,3,5,7,9

x would then be 9,1,3,5,7

but to be between 60 and 100

x must be 7 or 9

so the number must be 79 or 57

57 is not prime so

the number is 79

5 0
3 years ago
Find a z-score that has a distribution less than 30.5%
Ludmilka [50]
To the right: 0.51
to the left: -0.51
8 0
3 years ago
Read 2 more answers
You are writing a research paper on plant cells. You got 48,600,000 results on the online search. How do you write 48,600,000 in
never [62]

Place a decimal point between the first two digits (4 and 8). Erase the commas and the 0s. So you'll have 4.86 left over after you've done that erasing.

Now ask yourself: "how many places to the right must I move the decimal to get 4.86 to turn back to 48,600,000?"

That would be 7 places to the right. That 7 is the exponent over the 10

<h3>Therefore, the answer is 4.86 * 10^7</h3>

This number is 48.6 million

8 0
4 years ago
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