Question

What is the SST for the data set (1,5),(2,9),(4,10)?

A. 9
B. 8
C. 4
D. 14

Answer 1

14

Explanation:

SST = ∑ ( y − ȳ ) ² (ȳ = pronounced y bar is the mean of y values)

ȳ = (5+9+10)/3 = 24/3 = 8

∑ ( y − ȳ ) ² = ( 5 − 8 ) ² + ( 9 − 8 ) ² + ( 10 − 8 ) ²

= ( − 3 ) ² + ( 1 ) ² + ( 2 ) ²

= 9 + 1 + 4

= 14

Answer 2

the answer to this question is 14