Gibbs Baby Food Company wishes to compare the weight gain of infants using its brand versus its competitors. A sample of 40 babies using the Gibbs products revealed a mean weight gain of 7.6 pounds in the first three months after birth. For the Gibbs brand, the population standard deviation of the sample is 2.3 pounds. A sample of 55 babies using the competitor's brand revealed a mean increase in weight of 8.1 pounds. The population standard deviation is 2.9 pounds. At the 0.05 significance level, can we conclude that babies using the Gibbs brand gained less weight?

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