Letxandybe i. i.d. n(0,1), and letsbe a random sign (1 or−1, withequal probabilities) independent of (x,) determine whether or not (x, y,x+y) is multivariate normal.(b) determine whether or not (x, y,sx+sy) is multivariate normal.(c) determine whether or not (sx, sy) is multivariate normal.

answer: options

step-by-step explanation:

the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm