A researcher has participants read a vignette that describes a person making inappropriate remarks toward a colleague at work, and then they are asked to complete a survey. Lower total scores on the survey indicate more negative impressions of the person described in the vignette; higher total scores indicate a more positive impression. Convert the following date to z score to determine who scored above, below and the mean in this sample.

18	19	9	20
12	14	12	25
17	15	8	25
8	14	20	14
23	9	16	15
7	17	14	19
10	21	14	19
10	7	18	8
12	11	5	10
25	8	19	14