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2 years ago

What are two different statistics that demographers use to study population? define the statistics?

2 answers:

4 0

Birth rate and population density are used.

Birth rate is the number of births in a given year. Population density is the average number of people living in a particular area.

lara31 [8.8K]2 years ago

3 0

Answer:

Explained

Step-by-step explanation:

The two different statistics used by demographers to study population are

Birth rate are and Mortality rate.

Birth rate is the number of live birth per 1000 person per year in place.

Mortality

It is the number of deaths per 1000 person per year.

Statistics: Statistics is a science that deals with collection, classification,analysis and interpretation of numerical facts or data

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Step-by-step explanation:

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timurjin [86]

If the unknown value is x, then x = $\frac{14}{4}$ × 6 = 21.

Explanation:

Since it is a double number line with a ratio, all the ratios of one number line to the other will remain equal for all the values along both the number lines. Assume the unknown value to be x.
The ratio of the number on the first number line to the corresponding number on the second number line is calculated to be; $\frac{7}{2}$ = $\frac{14}{4}$ = $\frac{x}{6}$ = $\frac{28}{8}$ = $\frac{35}{10}$ = 3.5. So $\frac{x}{6}$ = 3.5, x = 3.5 × 6 = 21.
We can also calculate x by the following method. As ratios are equal we can directly substitute the value to another ration. So $\frac{14}{4}$ = $\frac{x}{6}$ , x = $\frac{14}{4}$ × 6 = $\frac{84}{4}$ = 21.