The breaking strength of hockey stick shafts m de of two different grphite-Kevl r composites yield the

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The breaking strength of hockey stick shafts m de of two different grphite-Kevl r composites yield the following results (in newtons):
The breaking strength of hockey stick shafts m de of

Find a 98% confidence interval for the difference between the mean breaking strengths of hockey stick hafts made of the two materials?

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