Red Meat Consumption Narrative
To test the theory that the consumption of red meat in Canada has decreased over the past 10 years, a researcher decides to select hospital nutrition records for 400 subjects surveyed 10 years ago and to compare their average amount of beef consumed per year to amounts consumed by an equal number of subjects interviewed this year. The data are given in the table.
-Refer to Red Meat Consumption Narrative. Find a 99% lower confidence bound for the difference in the average per capita beef consumption for the two groups. Does your confidence bound confirm your conclusions in the previous question? Explain. What additional information does the confidence bound give you?

Question

Red Meat Consumption Narrative
To test the theory that the consumption of red meat in Canada has decreased over the past 10 years, a researcher decides to select hospital nutrition records for 400 subjects surveyed 10 years ago and to compare their average amount of beef consumed per year to amounts consumed by an equal number of subjects interviewed this year. The data are given in the table. 
-Refer to Red Meat Consumption Narrative. Find a 99% lower confidence bound for the difference in the average per capita beef consumption for the two groups. Does your confidence bound confirm your conclusions in the previous question? Explain. What additional information does the confidence bound give you?

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The Answer of Red Meat Consumption Narrative
To test the theory that the consumption of red meat in Canada has decreased over the past 10 years, a researcher decides to select hospital nutrition records for 400 subjects surveyed 10 years ago and to compare their average amount of beef consumed per year to amounts consumed by an equal number of subjects interviewed this year. The data are given in the table. 
-Refer to Red Meat Consumption Narrative. Find a 99% lower confidence bound for the difference in the average per capita beef consumption for the two groups. Does your confidence bound confirm your conclusions in the previous question? Explain. What additional information does the confidence bound give you?