In an exam with a normal distribution of scores the mean is 78 with a standard deviation of 5 If you received 85 on this exam what is your standard score z-score

To find the z-score, we use the formula:

z = (x - μ) / σ

where: x = the individual score μ = the mean σ = the standard deviation

Plugging in the values, we get:

z = (85 - 78) / 5 z = 1.4

Therefore, if you received 85 on this exam, your standard score (z-score) is 1.4.