Question

Asked Oct 28, 2019

The caffeine content (in mg) was examined for a random sample of 50 cups of black coffee dispensed by a new machine. The mean and standard deviation were 110 mg and 7.1 mg respectively. Use the data to construct a 98% confidence interval for the mean caffeine content for cups dispensed by the machine.

Step 1

Given sample size of black coffee cups n = 50

Caffeine content mean = 110mg

Standard deviation = 7.1 mg

The Z score for 98% confidence interval will have 0.9...

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