For certain workers, the mean wage is $5.00/hr, with a standard deviation of $0.75. If a worker is chosen at random, what is the probability that the worker's wage is between $2.75 and $7.25? Assume a normal distribution of wages.
Added by Jose Maria F.
Step 1
The z-score formula is: z = (x - μ) / σ For $2.75/hr: z1 = ($2.75 - $5.00) / $0.75 = -3 For $7.25/hr: z2 = ($7.25 - $5.00) / $0.75 = 3 Show more…
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