Calculate the variance and standard deviation for the following sample set of data. (Do not round intermediate calculations. Round your final answers to the nearest tenth.)

79.8, 81.8, 50.8, 43.4, 73.4, 42.8

 

Variance

 

Standard deviation

 

 

How to find the sample variance and standard deviation?

In words, explain what is measured by SS, variance, and standard deviation.

(a) Finding Expected Value, Variance, and Standard Deviation In use the given probability density function over the indicated interval to find the (a) expected value, 

(b) Variance using the alternative formula, and 

(c) Standard deviation of the random variable.