The average weight of an airline passenger\'s suitcase is 45 pounds. The standard deviation is 2 pounds. If 15% of the suitcases are overweight, find the maximum allowed by the air. Assume the variable is normally distributed. The average hourly wage of fast-food workers employed by a nationwide chain is $5.55. The standard deviation is $1.15. If a person is selected at random, find the probability that his/her hourly wage is between $5.25 and $5.90. Find the value of z such that the probability of being to the left of z is 90 A ski resort loses $70.000 per season when it does not snow very much and makes $250,000 profit when does snow a lot. The chance of it snowing at least 75 inches (i.e. a good season) is 40%. Find the expected profit (or loss) for the resort. Given that 10% of all people are left-handed, (a) what is the probability that there will be at least 3 left-handed students in a class of 15? (b) what is the mean and variance for this random variable? Determine the value of c that makes f(x) = ce^, -infinity
answer 1)
given s=2,u=45
the z-value with a left tail of 0.85.
invNorm(0.85) = 1.0364
maximum allowed weight value
weight = z*s + u
weight = 1.0364*2+45 = 47.07 lbs
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