statistical methods

Height and weight are two measurements used to track a child's development. The World Health Organization measures child development by comparing the weights of children who are the same height and the same gender. In 2009, weights for all 80 cm girls in the reference population had a mean = 10.2 kg and standard deviation o 0.8 kg. Weights are normally distributed. X-N (10.2, 0.8). Calculate the 2-scores that correspond to the following weights and interpret them: 11 kg A child who weighs 11 kg is standard deviation(s) (above/below) the mean of 10.2 kg. 7.9 kg A child who weighs 7.9 kg is standard deviation(s) (above/below) the mean of 10.2 kg 12.2 kg A child who weighs 12.2 kg is standard deviation(s) (above/below) the mean of 10.2 ks