Answer:
The answer is - sample.
Step-by-step explanation:
Based on the set of 356 surveys that were completed and returned, the researcher finds that these students spend an average of 3.1 hours each day watching television.
For this study, the set of 356 students who returned the surveys is an example of a SAMPLE.
A sample is defined as a small part that shows what the whole population is like.
Answer:
M- 300
N- 225
Step-by-step explanation:
525 - 75 = 450
450/2= 225
225 + 75 = 300
Boys: x
gilrs: y
From the text of the task:

Replacing x:

So there are 28 girs and 20 boys
Frac. = 7/200
Dec. = 0.035