brsglover3021 brsglover3021

10-11-2022
Mathematics

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a certain type of equipment is manufactured with a mean tensile strength of 78.3 kilograms and a standard deviation of 5.6 kilograms. how is the variance of the sample mean changed when the sample size is (a) increased from 64 to 196? (b) decreased from 784 to 49?

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