Assume That

Essay

Assume that $$\sigma _ { 1 } ^ { 2 } = \sigma _ { 2 } ^ { 2 } = \sigma ^ { 2 } \text {. Calculate the pooled estimator of } \sigma ^ { 2 } \text { for } s _ { 1 } ^ { 2 } = 50 , s _ { 2 } ^ { 2 } = 57 \text {, and } n _ { 1 } = n _ { 2 } = 18 \text {. }$$