A railway company used 2 types of wheel mounts that differ in the way they handle...

A railway company used 2 types of wheel mounts that differ in the way they handle track irregularities: type A and type B. The following data gives the repair records for 2 types over a 1 year period:

	# of cars	# needing service
Type A	150	20
Type B	180	18

Test for the difference between population proportions P_A and PB.Use α = 0.02.

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orchestra answered 1 year ago

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A railway company used 2 types of wheel mounts that differ in the way they handle...

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