Question

In: Statistics and Probability

Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these...

Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these gears measured in foot-pounds is an important characteristic. A random sample of 10 gears from supplier 1 results in x1 = 290 and s1 = 12, and another random sample of 16 gears from the second supplier results in x2 = 292 and s2 = 22. Do the data support the claim that the mean impact strength of gears from supplier 2 is at least 10 foot-pounds higher than that of supplier 1, find the tcalc value? Please report your answer upto 3 decimal places.

Solutions

Expert Solution

tcalc = (() - ())/sqrt(s1^2/n1 + s2^2/n2)

       = ((290 - 292) - 10)/sqrt((12)^2/10 + (22)^2/16)

       = -1.796

                                        

                                    

                                      

                                                 

orchestra answered 2 years ago
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