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The Gibbs Baby Food Company wishes to compare




The Gibbs Baby Food Company wishes to compare the weight gain of infants using their brand versus their competitor's. A sample of 40 babies using the Gibbs products revealed a mean weight gain of 7.6 pounds in their first three months after birth. The standard deviation of the sample was 2.3 pounds. A sample of 55 babies using the competitor's brand revealed a mean increase in weight of 8.1 pounds, with a standard deviation of 2.9 pounds. The significance level is 0.05.;a) can we conclude that babies using the Gibbs brand gained less weight?;b) what is the p-value?;c) the value of the Z-statistic is;d)(rejection region) Reject H0 and accept H1 if


Paper#33227 | Written in 18-Jul-2015

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