Which of the following does not describe a rigid motion transformation? a. translating a figure 2 units left. b. rotating a figure 90 degrees. c. reflecting a figure across the x-axis. d. dilating a figure by a scale factor of one half

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample