Which sampling method divides the population up into sections, randomly selects some of those sections, then chooses all the members from the selected sections to study?

Answer: The above mentioned type of sampling is called cluster sampling.

Cluster sampling is a sampling technique in which the entire population of interest is divided into clusters or groups, then the investigator randomly selects some of these clusters and all the members of these randomly selected clusters are investigated.

3 0

2 years ago

A delivery truck drove 203 mi in 3.5 h. After unloading and loading new cargo, it traveled on another 243 mi for 4.5 h. What was

Firdavs [7]

The average speed of the truck is calculated by dividing the total distance traveled in a span of the total time given. From the given above, the total distance traveled is
total distance = 203 mi + 243 mi = 446 mi
and the total time it took for the whole trip is
total time = 3.5 h + 4.5 h = 8 h
The average speed is therefore,
average speed = 446 mi/8 h = 55.75 mi/h
Thus, the answer is letter A.

7 0

2 years ago

The data set shows the number of hours per week that each student in a class spends studying at home. What is the shape of the d

AVprozaik [17]

Answer:

The answer is symmetrical

Step-by-step explanation:

x x x

x x x x x

x x x x x x x

___________________________

1 2 3 4 5 6 7

4 0

3 years ago

A circle has a radius of length r. If you mark off an arc on the circle of length 2r what is the measurement of the angle that s

Inessa05 [86]

A full circle has a circumference of 2πr and an angle of 2π radians.

Set up a proportion:
2πr - 2π rad
2r - x rad

$2\pi r \times x = 2\pi \times 2 r \\
2\pi r x=4 \pi r \\
x=\frac{4 \pi r}{2 \pi r} \\
x=2$

The answer is D. 2 radians.

6 0

3 years ago

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