Recent content by PeterVincent

  1. P

    Homework help, want to check my method for probability and hypothesis test

    I would be most obliged if someone would look at my solution and advise if my method and answers are correct. Mean lifetime of brand X bulbs is known to be 4,500 hours with standard deviation of 450 hours. Part A A light bulb is selected at random find the probability that it will last...