Mathematics, 21.11.2019 06:31 veheca
Suppose a certain type of fertilizer has an expected yield per acre of μ1 with variance σ2, whereas the expected yield for a second type of fertilizer is μ2 with the same variance σ2. let s12 and s22 denote the sample variances of yields based on sample sizes n1 and n2, respectively, of the two fertilizers. show that the pooled (combined) estimator below is an unbiased estimator of σ2. sigma hat2 = (n1 − 1)s12 + (n2 − 1)s22 n1 + n2 − 2 e (n1 − 1)s12 + (n2 − 1)s22 n1 + n2 − 2 = n1 − 1 n1 + n2 − 2 e + n2 − 1 n1 + n2 − 2 e = n1 − 1 n1 + n2 − 2 + n2 − 1 n1 + n2 − 2 = σ2
Answers: 3
Mathematics, 21.06.2019 19:30, estherstlouis7812
1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show
Answers: 1
Mathematics, 21.06.2019 22:30, cramirezorozco392
Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120
Answers: 1
Suppose a certain type of fertilizer has an expected yield per acre of μ1 with variance σ2, whereas...