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The makers of a soft drink want to identify the average age of its consumers. A sample of 55 consumers was taken. The average age in the sample was 21 years with a standard deviation of 4 years.
a.Construct a 95% confidence interval for the true average age of the consumers.
b.Construct an 80% confidence interval for the true average age of the consumers.
c.Discuss why the 95% and 80% confidence intervals are different.
Traditionally Segregated
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A government system that provides financial assistance to people with an inadequate or no income, particularly during retirement, disability, or unemployment.
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Medicare
A federal health insurance program in the United States mainly for people aged 65 and older, as well as for some younger people with disabilities.
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