Quoto

Learn / Library / Statistics

Mean after a new observation

StatisticsMedium

The mean of quotes is . After a sixth quote is added, the mean of all quotes becomes . What is the sixth quote?

Checking an answer needs JavaScript. The hint and the solution open without it.

A whole number, a decimal, a fraction like 3/8 or a percent.

Hint

Compare the total sums before and after.

Solution
  1. The first quotes sum to .
  2. All quotes sum to .
  3. The sixth quote is the difference , so the answer is .

Answer:

Next questionBack to the library