Research indicates that in the past the population mean () of weight for newborn babies was 7.2 lbs., however, recent observations suggest that babies seem to be born heavier nowadays. A study was launched sampling 100 birth weights, the sample mean (x-bar) was 7.5 lbs. with a standard deviation of 0.7lbs

Find the z-value and p-value. Let a = 0.05, Test the claim that >7.2lbs.