The night before the exam, sleep. A rested mind recalls what a tired one has only read.

Statistics and Probability — quick quiz

2 KAR TET-pattern questions on Statistics and Probability. Instant scoring and solutions, no signup — see where you stand in a few minutes.

Question 1 of 2

Hard

The mean of 8 observations is 15. If one observation with value 20 is removed, what is the new mean?