7. [-/56 Points] DETAILS ASWESBE9 5.E.018. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The following data has been collected on the number of times that owner-occupied and renter-occupied units had a water supply stoppage lasting 6 or more hours in the past 3 months. Number of Units (1,000s) Number of Times Owner Occupied Renter Occupied 0 439 394 1 1,100 760 2 249 221 3 96 92 4 times or more 120 111 (a) Define a random variable x = number of times that owner-occupied units had a water supply stoppage lasting 6 or more hours in the past 3 months and develop a probability distribution for the random variable. (Let x = 4 represent 4 or more times. Round your answers to four decimal places.) f(x) xf(x) X - H (x - 1 ) 2 (x - # ) 2F( x) 2 3 4 (b) Compute the expected value and variance for x. (Round your answers to four decimal places.) expected value variance (c) Define a random variable y = number of times that renter-occupied units had a water supply stoppage lasting 6 or more hours in the past 3 months and develop a probability distribution for the random variable. (Let y = 4 represent 4 or more times. Round your answers to four decimal places.) f (y ) yf (y ) V - # (v - #) 2 ( x - " ) 2 F(x ) 0 2 3 (d) Compute the expected value and variance for y. (Round your answers to four decimal places.) expected value variance (e) What observations can you make from a comparison of the number of water supply stoppages reported by owner-occupied units versus renter-occupied units? The expected number of times that owner-occupied units have a water supply stoppage lasting 6 or more hours in the past 3 months is --Select-- O the expected value for renter-occupied units. The variability for owner-occupied units is --Select-- the variability for renter-occupied units. Need Help? Read It Watch It