Scores on the quantitative portion of the GRE are approximately normally distributed with mean =150.8 and standard deviation =8.8 A random sample of...

Scores on the quantitative portion of the GRE are approximately normally distributed with mean =150.8 and standard deviation =8.8

A random sample of 5 students was selected to take the GRE. Their scores are:

160, 175, 163, 149, 153

What is the z-score corresponding to the sample mean of these students' scores? (round your answer to 3 decimal places)