The current no smoking regulation in office buildings requires workers who smoke to take break and leaves the building in order to satisfy their habits. A study indicates that such workers average 32 minutes per day taking a smoke break. The standard deviation is 8 minutes. to help reduce the average break, rooms with powerful exhausts were installed in the buildings. To see whether these rooms serve their designed purpose a random sample of 110 smokers was taken. The total amount of time away from their desks was measured for 1 day. Test to determine whether there has been a decrease in the mean time away from their desks.

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H 0 32 H 1 32 The sample statistics are X 2992 Since t... View the full answer