7.29 Plant capacity.
A leading company chemically treats its product before packaging. The company monitors the weight of product per hour that each machine treats.
377
An SRS of 90 hours of production data for a particular machine is collected. The measured variable is in pounds.
prdwgt
7.29
(a) The data are slightly left-skewed but because , we can still use the procedures. (b) The margin of error for 90% is 1817.5. (c) (33,470.7, 37,105.7).
(d) The data are significant at the 5% level, and there is evidence that the mean pounds of product treated in 1 hour is greater than 33,000.