Answer:
A Margin of error : Generally margin can be defined as a statistical concept that informs the researcher or any person carrying statistical active the percentage by which his /her result will differ from the real population value.
B Margin of error is used to establish a confidence interval by adding and subtracting the statistical value (i.e sample proportion or sample mean ) from the margin of error
C Generally the confidence interval tell the researcher the probability by which a population parameter(sample proportion or sample mean) will fall between two set of values(Upper limit and the lower limit )
Step-by-step explanation:
