Q9 A food chemist analyzed the amount of caffeine in energy drinks based on a sample of 10 drinks. He believes that the amount of caffeine in energy drinks is normally distributed. Which interval should he use? t interval with 10 degrees of freedom Neither t nor z interval. t interval with 9 degrees of freedom z interval

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 14E
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A food chemist analyzed the amount of caffeine in energy drinks based on a sample of 10 drinks. He believes that the amount of caffeine in energy drinks is normally distributed. Which interval should he use?

t interval with 10 degrees of freedom

Neither t nor z interval.

t interval with 9 degrees of freedom

z interval

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