Mathematics, 02.08.2019 17:30 mrfishyyyy

The diameter of steel rods manufactured on two different machines is being investigated. two random samples of sizes n1=15 and n2=17 are selected. sample means and variances are x¯1=8.73,s12=0.35,x¯2=8.68,s22=0.39 . round your answers to two decimal places (e. g. 98.76). (a) construct a 90% two-sided confidence interval on σ12/σ22:

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The diameter of steel rods manufactured on two different machines is being investigated. two random...