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4 years ago

Why aren’t voluntary response samples usually representative of the population ?

Mathematics

2 answers:

FromTheMoon [43]4 years ago

7 0

The second choice is correct. An example of this is a voluntary "product feedback surveys" which tend to biased toward the negative. While people with both positive and negative feedback respond overall, customers who have a complaint are more motivated to take the time, and thus are overrepresented.

stira [4]4 years ago

4 0

definitely the second, the people who volunteer usually have a motive to do so and will be the only ones represented.

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Is this answer correct?

Aleks [24]

That’s correct!!!!!!

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3 years ago

If y = 3x3 – 2x and dx, dt equals 3, find dy, dt when x = –2. Give only the numerical answer. For example, if dy, dt = 4, type o

nlexa [21]

y=3x^3-2x, dx/dy =3

dy/dt= ? (when x=-2)

dy/dt= d/dt (3x^3 -2x)

= 9x^2(dx/dt) -2(dx/dt)

= 9(-2)^2 * 3 - (2*3)

= 9(4)*3 -6

= 102

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3 years ago

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4 years ago

Read 2 more answers

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SpyIntel [72]

Answer:

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3 years ago

Whats the middle number of 15 and 24

never [62]

Answer:

19.5

Step-by-step explanation:

15+24=39

39 divided by 2

=19.5

If there is an even number of numbers locate the two middle numbers so that there is an equal number of values to the left and to the right of these two numbers. Step 3: If there is an odd number of numbers, this middle number is the median. If there is an even number of numbers add the two middles and divide by 2.

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3 years ago