Find the mean of the data in the bar chart below.

1 answer:

7 0

Answer:

2.5

Step-by-step explanation:

First, you have to add them all up:

1 + 4 + 2 + 3 = 10

Now, since there is 4 PEOPLE, you have to divide it by 4.

10 / 4 = 2.5

And there you go, the answer is 2.5

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Answer: Random sampling

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A random sampling technique is a method of sampling in which each member for the sample is chosen randomly from the population.
Systematic sampling : It is a kind of random sampling in which the members get selected after a fixed interval but a random starting point.
Convenience sampling : It is a kind of random sampling in which the members get selected on the basis of researchers convenience.
Stratified sampling : It is a kind of random sampling in which the entire population is divided into a finite number of strata , the researcher select members for sample from each strata.
Cluster sampling : It is a kind of random sampling in which the entire population is divided into clusters. Then a random sample of cluster is drawn by researcher.

In the given situation , 784 adults are selected after their telephone numbers were randomly generated by a computer.

Therefore , the type of sampling used here is : random sampling

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