For numbers 8 to 9. It is of interest to estimate the mean lifespan bats in a certain locale. Two estimators, T1 and T2, have been proposed with the following properties: Estimator T1 T2 E[T] 18 23 V[T] 5 4 Suppose the true mean lifespan of bats is 20 years, 9. TRUE or FALSE: T1 is more precise than T2.

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