All categories

3 years ago

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

Mathematics

2 answers:

FromTheMoon [43]3 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]3 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.

You might be interested in

Almost there .......AAAAHHhH

madreJ [45]

Answer:

12/46

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Solve \large V=lwh for \large w.

storchak [24]

See attachment for math work and answer.

4 0

2 years ago

the fastest elevators in the Burj Khalifa can travel 330 feet in just 10 seconds how far does the elevator travel in 11 seconds

iVinArrow [24]

Answer:

363 feet

Step-by-step explanation:

330 ft / 10 seconds = 33 ft per second

33 * 11 seconds = 363 feet

6 0

2 years ago

Read 2 more answers

Is 5 + 3x1 - x) equivalent to 8 – 8x?

nalin [4]

Answer:

Step-by-step explanation:

5+3x is equal to 8x.

if there is no number in front of a variable, it is understood to be a one. so 1-x would basically be 1-1. this cancels out the x, making it impossible for the equivalent equation to be 8 - 8x

3 0

2 years ago

A family has two cars. The first car has a fuel efficiency of 15 miles per gallon of gas and the second has a fuel efficiency of

professor190 [17]

The fuel consumption of each of the cars during the week are as follows;

The first car consumes 20 gallons of fuel.

The second car consumes 30 gallons of fuel.

Reasons:

Fuel efficiency of the first car = 15 miles per gallon

Fuel efficiency of the second car = 35 miles per gallon

Combined distance traveled by the two cars in a week = 1,350 miles

The total gas consumption during the week = 50 gallons

Let x represent the number of gallons consumed by the first car, and let y

represent the number of gallons consumed by the second car, we get the

following system of simultaneous equations;

15·x + 35·y = 1,350...(1)

x + y = 50...(2)

Therefore;

y = 50 - x

Which gives;

15·x + 35 × (50 - x) = 1,350

15·x + 1,750 - 35·x = 1,350

1,750 - 1,350 = 35·x - 15·x = 20·x

400 = 20·x

x = 400 ÷ 20 = 20

The number of gallons consumed by the first car, x = 20 gallons

From equation (2), we have;

x + y = 50

y = 50 - x

Therefore;

y = 50 - 20 = 30

The number of gallons consumed by the second car, y = 30 gallons

Learn more about word problems that lead to simultaneous equations here:

brainly.com/question/1717365

6 0

2 years ago