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Mulenga Handabile Ltd is a manufacturing company that specialises in wire ropes. The company states that...

Mulenga Handabile Ltd is a manufacturing company that specialises in wire ropes. The company states that their wire ropes have a mean breaking strength of 4000kg. A buyer selected and tested 10 wire ropes and found their breaking strength to be 3500kg with a standard deviation of 2500kg. You have been requested to determine whether or not the mean breaking strength has:

(a) Changed.                                                                                        [10 Marks]

(b) Reduced.                                                                                        [10 Marks]

Note: Conduct your tests at 5% level of significance.

math   Statistics-And-Probability   
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Answer #1

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