Question

what are the mean, variance, and standard deviation of these values? round to the neasrest tenth. 92,97,53,90,95,98

Answer 1

mean (1/6){92 + 97 + 53 + 90 + 95 + 98}

= 87.5

variance (1/6){(92-87.5)^2 + (97-87.5)^2 + (53-87.5)^2 + (90-87.5)^2 + (95-87.5)^2 + (98-87.5)^2}

= 245.6

standard deviation √{1/6*[(92-87.5)^2 + (97-87.5)^2 + (53-87.5)^2 + (90-87.5)^2 + (95-87.5)^2 + (98-87.5)^2]}

= 15.7