MathematicsStatisticsJAMB
Find the standard deviation of 2, 4, 6 and 8.
Show answer
Answer: C. √5
Mean 5; squared deviations 9, 1, 1, 9 sum to 20; variance = 20/4 = 5, so SD = √5.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.