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Harman [31]
3 years ago
9

An EPA contractor needs to test the concentration of a substance in ten samples of the ground water. Seventy samples were

Mathematics
1 answer:
olga55 [171]3 years ago
7 0

Answer:

Systematic sampling

Step-by-step explanation:

An EPA contractor needing to test the concentration of a substance in ten samples out seventy samples provided form a single source at regular time intervals.

For the contractor to effectively carry out the testing he has to employ a Non-probability system of sampling which is called Systematic sampling, because in systematic sampling we can assume the population size (x ) which in this case is 70 and the sample size( n ) to be 10

He will have to select ;  ( x / n )^th of the sampling frame for best results

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The total percentage return on the share investment is 19.08% as calculated below as sum of the dividends yield and capital gains yield

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Step-by-step explanation:

The percentage total return on the share is given the total return/initial share price.

The total return is the addition of dividend yield and gains yield

dividend yield=dividend/share price

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Total percentage return=1.84%+17.24%

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