Question: The mean and variance of the time to complete the
The mean and variance of the time to complete the project in Exercise 7.58 was 145 minutes and 31 minutes2. What is the probability that it will take less than 2.5 hours to overhaul the machine?
Answer to relevant QuestionsThe annual rate of return on a mutual fund is normally distributed with a mean of 14% and a standard deviation of 18%.a. What is the probability that the fund returns more than 25% next year?b. What is the probability that ...The time between breakdowns of aging machines is known to be exponentially distributed with a mean of 25 hours. The machine has just been repaired. Determine the probability that the next breakdown occurs more than 50 hours ...Use the t table (Table 4) to find the following values of t.a. t.10, 15b. t.10, 23c. t.025, 83d. t.05, 195Use a computer to find the following values of χ2.a. χ2.25, 66b. χ2.40, 100c. χ2.50, 17d. χ2.10, 17The following function is the density function for the random variable X:a. Graph the density function.b. Find the probability that X lies between 1 and 3.c. What is the probability that X lies between 4 and 8?d. Compute ...
Post your question