Data on the weights (lb) of the contents of cans of diet soda versus the contents of cans of the regular version of the soda is summarized to the right. assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. test the claim that the contents of cans of diet soda have weights with a mean that is less than the mean for the regular soda. diet regularu u1 u2n 20 20x 0.780 lb 0.816 lbs 0.0044 lb 0.0074 lb