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:
Rate of return = 16%
Step-by-step explanation:
The computation of the rate of the return is shown below:
Data provided in the question
Current value of the investment = $20,880 = C
Originally cost = $18,000 = O
N = Net earnings = C - O
= $20,880 - $18,000
= $2,880
Based on the above information, the rate of return is
= 16%
Hence, the rate of return is 16%
Answer:
66 feet sq.
Step-by-step explanation:
Eleven times six would be sixty-six.
Break up 11 into its tens and ones
11*6 =60
1*6 =6
Add the two, 60+6 =66
Answer:
C
Step-by-step explanation:
the only it has constant rate of change (slope, gradient or derivative at every point is equal)
no 1. is a
no 2. is none of the above
