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A local real estate company wanted to know if attending a course on “How to be...

A local real estate company wanted to know if attending a course on “How to be a Successful Salesperson” can increase the weekly average sales (listed in thousands) of its employees. The company sent six of its salespersons to attend this course. Using a 1% significance level, can you conclude that the mean weekly sales for all salespersons as a result of attending this course has not changed? Assume that the population of paired differences has a normal distribution.

Sales Before the Course $120 $180 $250 $90 $140 $160

Sales After the Course $180 $240 $240 $140 $190 $200

Math   Statistics-And-Probability   
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