Question: Find the sample averages and standard deviations for the engine performance data in Figure 13.1. Figure 13.1 Engine age data. Engine age <5 years 5-10

Find the sample averages and standard deviations for the engine performance data in Figure 13.1.


Figure 13.1 

Engine age data.

Engine age <5 years 5-10 years >10 years Count 25 40 35 Defective 259

Engine age 10 years Count 25 40 35 Defective 259

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