The average cost of an IRS Form 1040 tax ling at Thetis Tax Service is $157.00. Assuming a normal distribution, if 70 percent of the lings cost less than $171.00, what is the standard deviation?
Answer to relevant QuestionsUse Excel to find each probability. a. P(X < 110) for N(100, 15) b. P(X < 2.00) for N(0, 1) c. P(X < 5,000) for N(6000, 1000) d. P(X < 450) for N(600, 100) The default rate on government-guaranteed student loans at a certain public four-year institution is 7 percent. (a) If 1,000 student loans are made, what is the probability of fewer than 50 defaults? (b) More than 100? Show ...In Santa Theresa, false alarms are received at the downtown re station at a mean rate of 0.3 per day. (a) What is the probability that more than 7 days will pass before the next false alarm arrives? (b) Less than 2 days? (c) ...A passenger metal detector at Chicago's Midway Airport gives an alarm 0.5 time a minute. (a) Find the median waiting time until the next alarm. (b) Find the first quartile of waiting time before the next alarm. (c) Find the ...Discuss why you would or would not expect each of the following variables to be normally distributed. a. Time for households to complete the U.S. Census short form. b. Size of automobile collision damage claims. c. Diameters ...
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