# Question

A random sample of 10 speed skaters, all of the relatively same experience and speed, were selected to try out a new specialty blade.The difference in the short track times were measured as current blade time – specialty blade time, resulting in mean difference of 0.165 second with a standard deviation equal to 0.12 second. Does this sample provide sufficient reason that the specialty blade is beneficial in achieving faster times? Use a = 0.05 and assume normality.

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