Question

7. -11 points ASWSBE13 6.E.019. BM You may need to use the appropriate appendix table to answer this question. Automobile repair costs continue to rise with the average cost now at $367 per repair. Assume that the cost for an auton repair is normally distributed with a standard deviation of $88. Answer the following questions about the cost of automobi repairs. (a) What is the probability that the cost will be more than $470? (Round your answer to four decimal places.) (b) What is the probability that the cost will be less than $2507 (Round your answer to four decimal places.) (c) What is the probability that the cost will be between $250 and $4707 (Round your answer to four decimal places.) (d) If the cost for your car repair is in the lower 5% of automobile repair charges, what is your maximum possible cost in dollars? (Round your answer to the nearest cent.) Need Help? Read It Talk to a Tutor

Answer 1

Here, X NN (367,88) :. From statistical table, a) P(x>470) = 0. 1209 b) p ( x < 250) = 0.0918 c) P (250<x<470) = P(x<470) - P(x2250) = 0.8790 - 0.0918 = 0.7872 d) P( x x ) = 0.05 x = 222 . maximum possible cost is $222