Answer:
The sampling method used is a stratified sampling method
Step-by-step explanation:
sampling is the selection of a predetermined representative subpopulation from a larger population, to estimate the characteristics of the whole population.
Stratified sampling: Here, the total population are divided into subcategories (strata) before sampling is done. The strata are formed based on some common characteristics. In our example, the times of the day (morning, afternoon and evening) has widely varying atmospheric conditions which will add biases to the measurement of air quality. For example, the air in the morning if compared to the afternoon in an industrial area may be purer because of minimal industrial activity, hence effective comparison will be made by stratification.
Answer:
i believe the answer is B, im not 100% though
Step-by-step explanation:
We can name an angle either by naming its vertex or by three letters , keeping the letter of vertex in between.
so here vertex is F
we can name it as ∠EFG, ∠F , ∠GFE
This strikes out the option B that is ∠G
so option B is the answer
Answer:
- Martin is 40 and Ada is 14
Step-by-step explanation:
- Martin's age = m
- Ada's age = a
<u>Martin is two years younger than three times his daughter Ada’s age:</u>
<u>The sum of their ages is 54:</u>
<u>Solving this equation for m:</u>
<u>Eliminate m:</u>
<u>Solve for a:</u>
- 3a + a = 54 + 2
- 4a = 56
- a = 56/4
- a = 14
<u>Find m:</u>
Martin is 40 and Ada is 14