1-year-old baby boy's weights have a mean of 23 pounds with a standard deviation of 3 pounds. Sam weighs 17.6 pounds at his 1-year checkup, what is the z-score for his weight? 2 points What percentile of weights he would be in? Do not enter a label. 1 point How would you explain the meaning of the percentile value to someone not familiar with the term percentile? 2 points