Aquality control technician checked a sample of 30 bulbs. two of the bulbs were defective. if the sample was a representative, find the number of bulbs expected to be defective in a case of 450. a.) 30 b.) 24 c.) 36 d.) 45

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