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A leading consumer magazine, The False Traders, claims that the small coffee sold at PHILZ coffee...

  1. A leading consumer magazine, The False Traders, claims that the small coffee sold at PHILZ coffee shop does not contain 12 ounces of coffee. A sample of 25 customers who purchased a small coffee yielded the following information:

- a sample mean of 12.10 ounces and a sample standard deviation of 0.25 ounces.

(5)        a. Set up a 95% confidence interval for the true population mean.

(10)      b. At the 10% level, test the alternate hypothesis that the true mean is not equal to 12 ounces.

Math   Statistics-And-Probability   
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