Which graph is an example of a cubic function?
-5
4 -3 -2 -1, 1
1
2
3
4
5
x
7
7
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Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.