Question: Consider a random-effects model for the singlefactor completely randomized design. (a) Show that a 100(1 )% confidence interval on the ratio 2

Consider a random-effects model for the singlefactor completely randomized design. 

(a) Show that a 100(1 − α)% confidence interval on the ratio σ2τ / σ2 + σ2τ) is


VI L 1+L+0 U 1+U


where L and U are as defined in Exercise 13-74.

(b) Use the results of part (a) to find a 100(1 − α)% confidence interval for σ2 / (σ2 +σ2τ).

VI L 1+L+0 U 1+U

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