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:

Solve the problem by making up an equation. a child is 12 years old, and his father is 32 years older. in how many years will the age of the father be 3 times the age of the child?

Can u guys do this ratio question. this is extremely urgent a tap is leaking water at a rage of 1l every 8 hours. how long will it take for the tap to leak a total of 300ml?

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.