1. A certain industrial process is brought down for
recalibration whenever the quality of the items produced falls
below specifications. Let X represent the number of times the
process is recalibrated during a week. X can take on the values 0,
1, 2, 3, and 4 with the corresponding probability density
functions, f(x), 0.35, 0.25, 0.20, 0.15 and 0.05. (PLEASE
EXPLAIN)
a)Find the population mean of X. Round answer to 2 decimal
places
b)Using the information in the previous problem, calculate the
population variance. Round answer to 2 decimal places.