Question

The average mark of candidates in an aptitude test was 138.5 with a standard deviation of
10.6. Three scores extracted from the test are; 178, 122, 100. What is the average of the
extracted scores that are extreme values (outliers)? Correct your answer to the nearest
whole number

Answer 1

Answer:

178

Step-by-step explanation:

given the standard deviation as 10.6 and the mean as 138.5

• then the outliers is given by
• 138.5±10.6×3
• = range (106.7,170.3)
• therefore the extreme value of the outlier is 178