Illustration 19.34. A persòn buys 100 electric tubes each of two well-known makes, taken at random from the stocks for testing pur- pose. He finds that make A has a mean life of 1300 hrs with SD=82 hrs, and make B has a mean life of 1248 hrs with SD=93 hrs. Dis- cuss the significance of these results.

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A: From the provided information, Mean (µ) = 10 Standard deviation (σ) = 3

Q: #3

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A: x¯=4.1250y¯=16.6213Sx=2.2321Sy=7.4167   r=0.9420

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Q: 1.11 3? 5.62 7.09 Look at the relative frequency table above. What is P(X = 3)?

A: We know that,  ∑p = 1 p + 0.11 + 0.62+0.09 = 1 p = 1 - 0.82 p = 0.18

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A: The provided information is: For the current machine,  Sample meanx¯1=10 Sample sizen1=50 Sample…