Question

у
4) Given the following information, Ex? = 90,
Ex,y;= 60, r = 0.8, o 2.5, where x, and
y, are the deviations from their respective
means. Find the number of items.​

Answer 1

Answer:

x

=3,

y

=5,σ

x

=5,σ

y

=4,r=0.5

b

yx

=r⋅

σ

x

σ

y

=0.5×

5

4

=0.4,

b

xy

=r⋅

σ

y

σ

x

=0.5×

4

5

=0.625

y=9

x=0.625×9−0.125=5.625−0.125=5.5