At Shelley's Beading Boutique, there are 15 plastic beads and 15 metal beads on clearance. What percentage of the beads on clearance are plastic?

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