Recent research shows that the total number of time, measured in hours, that a teenage spends on social media over a per
Posted: Mon Sep 06, 2021 7:10 am
Recent research shows that the total number of time, measured in hours, that a teenage spends on social media over a period of one week is a random variable X having the density function shown to the right. Find the variance of X. (4)« (x-9), 9