Birth weights of babies born to full-term pregnancies follow roughly a normal distribution. at meadowbrook hospital, the mean weight of babies born to full-term pregnancies is 7 lbs with a standard deviation of 14 oz (1 lb = 16 oz). dr. watts has four deliveries (all for full-term pregnancies) coming up tonight. assume that the birth weights of these four babies can be viewed as a simple random sample. what is the probability that the average weight of the four babies will be more than 7.5 lbs?