If you fail, never give up because FAIL means 'First Attempt In Learning'.— A. P. J. Abdul Kalam

Statistics — quick quiz

5 real SZF IOM questions on Statistics. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 5

EASY

The mean of five numbers is 18. If four numbers are 15, 20, 22, and 13, what is the fifth number?