The total number of hours, in units of 100 hours, that a family runs a vacuum cleaner over a period of one year is a random variable X having the density function given in Exercise 4.13 on page 117. Find the variance of X.

Week 3: Distribution of Data (rest of Ch.2) 20 September, 2016 Basic Statistics for Research Professor HK Dong Wendy Liu Summary of Standard Notation: Variable sample Population Mean Standard deviation Variance Data set size 5 number summary – forms box & whisker plot Min – smallest value in data set th Q1– 25 percentile;...