A random sample of 100 recorded deaths in the United States during the past year showed an average life span of 71.8 years. Assuming a population standard deviation of 8.9 years, does this seem to...

A random sample of 100 recorded deaths in the United States during the past year showed an average life span of 71.8 years. Assuming a population standard deviation of 8.9 years, does this seem to...

77 -4 4 -24

Compute the mean and variances of the following discrete probability distribution. X ...

Dispersion - Deviation and Variance Dispersion measures how the various elements behave with regards to some sort of central tendency, usually the mean. Measures of dispersion include range, interquartile range, variance, standard deviation and absolute deviation. We've already looked at the first two in the Averages section, so let's move on to the other measures. Absolute... read more

Konstantinos K.

Math/Physics Tutor (Calculus Probability Statistics Physics SAT/ACT)

Springfield, NJ

4.9
(359 ratings)

Jesse W.

Bayesian Archaeologist

Brooklyn, NY

Avi N.

Math Made Easy & Computer Skills Too

Tenafly, NJ

5.0
(168 ratings)