Stat Week11

sd of teh age of all students in the class is a

• pp

• ss

• non

In SLRM: Y=-2+3*X, a=? and b=?

• a=-2

  b=3

• a=3

  b=-2

In Y=-4-2*X, as X increases Y goes down

• T

• F

cosnider Y=10+2*X, then Cor(X,Y)<0

• T

• F

Consider Y=-1+2*X, if X goes up by 4 units, how many units Y would go down

• 8

• Y can only increase

consider Y=-1-3*X. X decreases by 4 Units, how Y changes

• +12

• -12

• 0

the cov(X,Y)>0

• T

• F