Answered: he mg of nicotine in menthol cigarettes…

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter13: Probability And Calculus

Section13.3: Special Probability Density Functions

Problem 7E

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The mg of nicotine in menthol cigarettes is normally distributed and a sample of 25 menthol cigarettes had a standard deviation of 0.24 mg of nicotine. We will be constructing a 90% confidence interval containing the population variance.

The left hand critical value is . Round to 3 decimal places.

The right hand critical value is . Round to 3 decimal places.

The true variance of the mg of nicotine found in menthol cigarettes is in the interval ( , ). Round your answers to 3 decimal places.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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