The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 8.6 mg and a standard deviation of 1.53 mg. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. The supporting evidence consists of a sample of 31 cigarettes with a mean nicotine amount of 8.023 mg. Assuming that the given mean and standard deviation have NOT changed, find the probability of randomly seleting 31 cigarettes with a mean of 8.023 mg or less. P(M<8.023 mg)%D Based on the result above, is it valid to claim that the amount of nicotine is lower? O Yes. The probability of this data is unlikely to have occurred by chance alone. O No. The probability of obtaining this data is high enough to have been a chance occurrence.

The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 8.6 mg and a standard deviation of 1.53 mg. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. The supporting evidence consists of a sample of 31 cigarettes with a mean nicotine amount of 8.023 mg. Assuming that the given mean and standard deviation have NOT changed, find the probability of randomly seleting 31 cigarettes with a mean of 8.023 mg or less. P(M<8.023 mg)%D Based on the result above, is it valid to claim that the amount of nicotine is lower? O Yes. The probability of this data is unlikely to have occurred by chance alone. O No. The probability of obtaining this data is high enough to have been a chance occurrence.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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