1) What measurements assesses the amount of variance of change in the dependent variable reflected by changes in the independent variable?

a) Coefficient of determination ( R- squared),

b) Coefficient of least squares,

c) Coefficient of alineation,

d) correlation coefficient (r),

2) The range of a sample of 10 values is 5 and the largest observation is 50 . The lowest value is:

a) 40

b) 45,

c) 55,

d) cannot be computed from the data given