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The makers of a soft drink want to identify the average age of its consumers. A...

The makers of a soft drink want to identify the average age of its consumers. A sample of 16 consumers is taken. The average age in the sample was 22.5 years with a standard deviation of 5 years. Assume the population of consumer ages is normally distributed.

a.Construct a 95% confidence interval for the average age of all the consumers.

b.Construct an 80% confidence interval for the average age of all the consumers.

c.Discuss why the 95% and 80% confidence intervals are different.

d.Interpret the confidence interval estimate that you constructed in part d.

Math   Statistics-And-Probability   
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