Public health officials claim which people living in low income neighborhoods have different Physical Activity Levels (PAL) than general population. This is based upon knowledge that in the U.S., the mean PAL is 1.60 and standard deviation is 0.48. A study took the random sample of 48 people who lived in low income neighborhoods as well as found their mean PAL to be 1.54.
Determine the critical value of z? Report the critical value CLOSEST to your calculated z-score. (Answer to 2 decimal places.)