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Use Normal Distribution to solve problems 3 – 4 3. The hourly wage earned by workers at a state correctional institution is normally distributed with mean of $9.10 and standard deviation of $0.90. a) What is the probability that a worker’s hourly wage is between $8.20 and $10.90? P( 8.20 < X < 10.90) = c) What amount in dollars separates bottom 10% of these workers?

Let X is a random variable which denote the hourly wage earned by workers. Then it is given that X is normally distributed with mean ?=$9.10 and stand