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10. The population mean of annual salary for plumbers is $46,700, with a standard deviation of...

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Statistics

10. The population mean of annual salary for plumbers is$46,700, with a standard deviation of $5600. A random sample of 42plumbers is drawn from this population. Find the probability thatthe mean salary of the sample is (a) less than $44,000. (b) between$40,000 and $51,000 (c) more than $55,000

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a let X annual salary has mean 46700 and standard    See Answer
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