1)Suppose X is normally distributed with mean equals -1 and standard deviation equals 4. Find P(X<0) 2)Suppose X is normally distributed with mean equals -1 and standard deviation equals 4. Find P(X>1) 3)Cars arrive at a car wash randomly and independently; the probability of an arrival is the same for any two-time intervals of equal length. The mean arrival rate is 20 cars per hour. What is the probability that 2 or more cars will arrive during any given hour of operation?
1)Suppose X is
2)Suppose X is normally distributed with mean equals -1 and standard deviation equals 4. Find P(X>1)
3)Cars arrive at a car wash randomly and independently; the probability of an arrival is the same for any two-time intervals of equal length. The mean arrival rate is 20 cars per hour. What is the probability that 2 or more cars will arrive during any given hour of operation?
4)The mean hourly pay rate for financial managers in the East North Central region is $32.62, and the standard deviation is $2.32 (Bureau of Labor Statistics, September 2005). Assume that pay rates are normally distributed. How high must the hourly rate be to put a financial manager in the top 10% with respect to pay?
5)The mean hourly pay rate for financial managers in the East North Central region is $32.62, and the standard deviation is $2.32 (Bureau of Labor Statistics, September 2005). Assume that pay rates are normally distributed. For a randomly selected financial manager, what is the probability the manager earned less than $28 per hour?
6)The following data show the age at the time of first marriage for a sample of women: 20 28 23 30 24 29 26 2522 22 25 23 27 26 19. Compute the first and third
7)The following data show the age at the time of first marriage for a sample of men: 26 23 28 25 27 30 26 35 2821 24 27 29 30 27 32 27 25. Determine the
8)Suppose X is normally distributed with mean equals 10 and the standard deviation equals 1. Find x such that P(X<x)=0.95
9)Suppose X is normally distributed with mean equals 10 and the standard deviation equals 1. Find P(9.5<X<11)
10)Suppose X is normally distributed with mean equals 10 and the standard deviation equals 1. Find P(9.5<X<11)
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