Samantta

An assembly process includes a torque wrench device that automatically tightens compressor housing bolts; the device has a known process standard deviation of ó = 3 lb-ft in the torque applied. A simple random sample of 35 nuts is selected, and the averag...

why the use of calculators and/or computer programs is good or bad for students taking Business statistics?

what are some ways management can prevent political behavior?

The International Council of Shopping Centers reports that the average teenager spends $39 during a shopping trip to the mall. The promotions director of a local mall has used a variety of strategies to attract area teens to his mall, including live bands...

A random sample of size 15 taken from a normally distributed population reveled a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean would equal?

If you are interested in determining the average of a 3-minute telephone call to locations within the continental U.S. what sample size must you take to be 96% confidential that the results will be within $.75 of the true mean cost per call? From the phon...

A mortgage broker is offering home mortgage at a rate of 9.5% but is fearful that this value is higher than many others are charging. A sample of 40 mortgages files in the country court house shows an average of 9.25% with a standard deviation of 8.61%. D...