Figure the mean and median for this set of data:
13,18,13,14,13,16,14,21,13

Which statement about perfect cubes is true

Can someone tell me if this is perpendicular? !

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.