A random sample of 14 cigarettes of a certain brand has an average nicotine content of 3.6 milligrams and a standard deviation of 1.9 milligrams. What is the lower bound of the 99% confidence interval for the average nicotine content of the cigarettes.

A random sample of 14 cigarettes of a certain brand has an average nicotine content of 3.6 milligrams and a standard deviation of 1.9 milligrams. What is the lower bound of the 99% confidence interval for the average nicotine content of the cigarettes.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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Question

1. A random sample of 14 cigarettes of a certain brand has an average nicotine content of 3.6 milligrams and a standard deviation of 1.9 milligrams. What is the lower bound of the 99% confidence interval for the average nicotine content of the cigarettes. 2. According to Dietary Goals for the US (1977), high sodium intake may be related to ulcers, stomach cancer, and migraine headaches. The human requirement for salt is less than 220 milligrams per day, which is surpassed in most single servings of ready- to-eat noodles. If a random sample of 9 similar servings of noodles has a mean sodium content of 238 milligrams and a standard deviation of 8.3. What is the standard error of the 95% confidence interval of the mean sodium content of the noodles being investigated? Note: Round your answer to 4 decimal places.

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