Question

See the confidence interval diagram. The margin of error is represented by

a. the dot labelled “a”.

b. the dashed arrow labelled “b”.

c. the arrow labelled “c”.

d. the double arrow labelled “d”.

Answer 1

Answer will be (d) The double Arrow labelled "d"

The margin of error can be calculated in two ways, depending on whether you have parameters from a population or statistics from a sample: Margin of error = Critical value x Standard deviation for the population. Margin of error = Critical value x Standard error of the sample.

A margin of error tells you how many percentage points your results will differ from the real population value. For example, a 95% confidence interval with a 4 percent margin of error means that your statistic will be within 4 percentage points of the real population value 95% of the time.