From the data given below find the number of items (n) : r = 0.5, E xy = 120, oy= 8, E x = 90 %3D Where x and y are deviations from arithmetic mean.

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Q: Show that for a random sample of size 2 from N (0, ở²) population, E[Xm] = - o/Vr.

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Q: P(z-1.45)= P(-1.88<z<0.5)= P(-0.69<z<0.69)=

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Q: E 1.5/3 pts O 3 87 O Details A jar contains 3 pennies, 8 nickels and 4 dimes. A. child selects 2 coi...

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