Homework Question

2. [21} pts]} A Gaussian random voltage has a mean value of volts { x 2 2] and a standard deviation of: volts (Ex = 2,0'5} = 4 ]. (See last page for a standard normal CDF table and er'} table.) You may oompute the probabihqr using either the CDF table or erfI} table, whichever you prefer. {a} What is the probability that the observed value of the voltage is less than or equal to zero volts? {b} What is the probability that an observed value of the voltage is greater than -2 volt but less than ti volts. {c} What is the ]:irobabilit3|.ur that the observed value of the voltage is greater than 3 volts