Which of the following statements represents a difference between a sample survey and an observational study? a) presence of population. b)inclusion of numerical data. c)people are aware that they are participating. d)ability to collect information.

c seems most likely from the given answers

Step-by-step explanation:

C) People are aware that they are participating.

The sample survey is the technique which is initiates after taking proper consent from the participants by explaining the purpose of study and then data is collected which can be in the form of output of measurements, opinion about a cause or issue. But the observational study does not explain the purpose of the study to the participants, it just involves the data collection.

Therefore, on the basis of the above description, People are aware that they are participating. is the relevant option.

the answer is d

step-by-step explanation:

the camry sales+accord sale=828,000. to make it so the two numbers are 18 thousand apart and still equal 828,000, you first need to find out what half of 828,000 is. 828,000/2=414,000. for the two numbers to equal 828,000, you have to add the same amount as you subtract from the middle. in this case, the number is 9,000 because it's half of 18,000. to equal 828,000, you have to add 9,000 to 414,000 for the camry and subtract 9,000 from 414,000 for the accord. 414,000+9,000=423,000.

414,000-9,000=405,000.

423,000+405,000=828,000.

423,000-405,000=18,

hope it