(4 pts) The definition of variance is the expectation of the squared deviation from the mean. Why
then do we use the formula s2=N11n=1N(xnx)2 to estimate variance from a sample of
observations?.
Personalisation of Education by AI and Big Data - Lourdes Guàrdia
4 pts The definition of variance is the expectation of the.pdf
1. (4 pts) The definition of variance is the expectation of the squared deviation from the mean. Why
then do we use the formula s2=N11n=1N(xnx)2 to estimate variance from a sample of
observations?