Home › TS EAMCET › Mathematics › Statistical Dispersion › Normal data have mean 100 and SD 15. About 99.7%…
Normal data have mean 100 and SD 15. About 99.7% of values lie between
A70 and 130
B55 and 145
C85 and 115
D40 and 160
Answer & Solution
Correct answer: B. 55 and 145
Three standard deviations is 45, so the limits are 100 minus 45 and 100 plus 45, namely 55 and 145.
Related questions
Data with SD 4 have 5 subtracted from each value, then are doubled. New SD?X has SD 3 and Y = -2X + 5. The standard deviation of Y isA measure of dispersion can never beA five-sigma result corresponds to a random fluctuation chance of aboutThe standard deviation of one roll of a fair die is aboutThe variance of the score on one roll of a fair die isTechnically, variance is which moment of a distribution?Variance computed from only a subset of observations is called