Which could be the entire interval over which the
function, f(x), is negative?
Х
-8
-6
-4
-2
f(x)
-16
-8
0
8
16
32
64
128
O (-8,-2)
O (-8,0)
• (-00, 6)
O(-0,4)
O ANO
6
Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?