Question

The Sergio Lumber Company manufactures plywood. One step in the process is the one where the veneer is dried by passing through a huge dryer (similar to an oven) where much of the moisture in the veneer is extracted. At the end of this step, samples of veneer are tested for moisture content. It is believed that pine veneer will be less moist on average than will fir veneer. The following data were reported recently where the values represent the percent of moisture in the wood:

PineFir
13.119.8
10.213.5
14.720.3
17.820.5
17.621.4
19.223.4
7.414.6
13.318.8
17.3
10.7


The null and alternative hypotheses to be tested are
H0 : p f
Ha : p < f

Answer

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