Mary needs to memorize words on a vocabulary list for russian class. she has 8 words to memorize, and she is one-half done. how many words has mary memorized so far?

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