What are confidence intervals and how are they used? with example

It helps to target the mass population in a single stroke and businesses can specify the appropriate area to target the precise kind of audience Example: A common confidence interval acceptable to management is 95%. This means that 19 out of 20 samples taken (95%) will give results that are representative of the overall population. Or to put it another way - 1 out of 20 (5%) are unrepresentative!