(b) Gibbs Baby Food Company wishes to compare the weight gain of infants using its bran its competitor's. A sample of 40 babies using the Gibbs products revealed a mean wei of 7.7 pounds in the first three months after birth. For the Gibbs brand, the population deviation of the sample is 2.2 pounds. A sample of 55 babies using the competitor revealed a mean increase in weight of 8.15 pounds. The population standard deviation pounds. At the 0.05 significance level, can we conclude that babies using the Gibl gained less weight?

(b) Gibbs Baby Food Company wishes to compare the weight gain of infants using its bran its competitor's. A sample of 40 babies using the Gibbs products revealed a mean wei of 7.7 pounds in the first three months after birth. For the Gibbs brand, the population deviation of the sample is 2.2 pounds. A sample of 55 babies using the competitor revealed a mean increase in weight of 8.15 pounds. The population standard deviation pounds. At the 0.05 significance level, can we conclude that babies using the Gibl gained less weight?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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Question

Transcribed Image Text:(b) Gibbs Baby Food Company wishes to compare the weight gain of infants using its brand versus its competitor's. A sample of 40 babies using the Gibbs products revealed a mean weight gain of 7.7 pounds in the first three months after birth. For the Gibbs brand, the population standard deviation of the sample is 2.2 pounds. A sample of 55 babies using the competitor's brand revealed a mean increase in weight of 8.15 pounds. The population standard deviation is 2.85 pounds. At the 0.05 significance level, can we conclude that babies using the Gibbs brand gained less weight?

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