How many numbers must be selected from the set
{1, 3, 5, 7, 9, 11, 13, 15} to guarantee that at least one pair
of these numbers add up to 16?

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