Question

Maria handed in her final data management
project last week. The class mean was 83%
with a standard deviation of 8. If Maria’s
mark produced a z-score of 1.09, what was
her grade?

Answer 1

You can play around with Z table stuff at
http://davidmlane.com/hyperstat/z_table.html

Answer 2

I have tried but could not get through ,,,, any hint

Thx

Answer 3

well, yeah. Her score was 1.09 STD above the mean, so
83 + 1.09*8 = 91.72

Answer 4

Thx