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Results for a 1997 survey of about 25,000 female nonfarm wage and salary workers were published in the Monthly Labor Review in 1998. Hours worked in the week prior to the survey were found to have mean 36.90 and standard deviation 11.93.
a. Find the standardized sample mean weekly hours worked, if population mean was equal to 40.
b. Based on your answer to part (a), what do we conclude about the population mean hours worked by female nonfarm wage and salary workers?
Bob throws six dice and wins if he scores at least one ace. Alice throws 12 dice and wins if she scores at least two aces. Who has the greater probability of winning?
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a researcher collects data to see if medical insurance type and doctors visits per year are related. he obtains the
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A 1-lb ball A is traveling horizontally at 20ft/s when it strikes a 10-lb block B that is at rest. If the coefficient of restitution between A and B is e=0.6 , and the coefficient of kinetic friction between the plane and the block is µk = 0.4,
Event A and Event B are independent events. P(A) = 0.7 P(B) = 0.4. What is P(A|B)?
After being repaired, a machine functions for an exponential time with rate λ and then fails. Upon failure, a repair process begins. The repair process proceeds sequen- tially through k distinct phases. First a phase 1 repair must be performed, th..
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