Question

PLease help on this math The average cost per once for glass cleaner is 7.7 cents with a standard deviation of 2.5 cent. what is the Z-score of glass cleaner with a cost of 10.1 cents per ounce A:0.96 B:1.31 C:1.94 D:4.04 E: none of the above

Answer 1

z = (10.1 - 7.7) / 2.5 = 2.4 / 2.5 = 0.96