Intro Stats, Books a la carte Plus NEW MyLab Statistics with Pearson eText -- Access Card Package (5th Edition)

5th Edition

ISBN: 9780134210247

Author: Richard D. De Veaux, Paul Velleman, David E. Bock

Publisher: PEARSON

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Textbook Question

Chapter 14, Problem 21E

Meal plan After surveying students at Dartmouth College, a campus organization calculated that a 95% confidence interval for the mean cost of food for one term (of three in the Dartmouth trimester calendar) is ($1372, $1562). Now the organization is trying to write its report and is considering the following interpretations. Comment on each.

a) 95% of all students pay between $1372 and $1562 for food.
b) 95% of the sampled students paid between $1372 and $1562.
c) We’re 95% sure that students in this sample averaged between $1372 and $1562 for food.
d) 95% of all samples of students will have average food costs between $1372 and $1562.
e) We’re 95% sure that the average amount all students pay is between $1372 and $1562.

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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Chapter 14, Problem 20E

Chapter 14, Problem 22E

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Chapter 14 Solutions

Intro Stats, Books a la carte Plus NEW MyLab Statistics with Pearson eText -- Access Card Package (5th Edition)

Ch. 14.2 - Every 10 years, the United States takes a census....Ch. 14.2 - Prob. 2JC Ch. 14.2 - Prob. 3JC Ch. 14.2 - Every 10 years, the United States takes a census....Ch. 14.2 - Prob. 5JC Ch. 14.3 - Prob. 6JC Ch. 14 - Salmon A specialty food company sells whole King...Ch. 14 - LSAT The LSAT (a test taken for law school...Ch. 14 - Prob. 3E Ch. 14 - Prob. 4E

Ch. 14 - More tips The waiter in Exercise 3 usually waits...Ch. 14 - More groceries Suppose the store in Exercise 4 had...Ch. 14 - Prob. 7E Ch. 14 - t-models, part II Using the t tables, software, or...Ch. 14 - t-models, part III Describe how the shape, center,...Ch. 14 - Prob. 10E Ch. 14 - Prob. 11E Ch. 14 - Home sales again In the previous exercise, you...Ch. 14 - Prob. 13E Ch. 14 - Salaries A survey finds that a 95% confidence...Ch. 14 - Cattle Livestock are given a special feed...Ch. 14 - Prob. 16E Ch. 14 - Prob. 17E Ch. 14 - Student survey revisited Chapter 2, Exercise 86...Ch. 14 - Prob. 19E Ch. 14 - Prob. 20E Ch. 14 - Meal plan After surveying students at Dartmouth...Ch. 14 - Prob. 22E Ch. 14 - Prob. 23E Ch. 14 - Crawling Data collected by child development...Ch. 14 - Prob. 25E Ch. 14 - Credit card charges A credit card company takes a...Ch. 14 - Prob. 27E Ch. 14 - Pulse rates In the latest National Health and...Ch. 14 - Prob. 29E Ch. 14 - Parking Hoping to lure more shoppers downtown, a...Ch. 14 - Prob. 31E Ch. 14 - Prob. 32E Ch. 14 - Speed of light In 1882, Michelson measured the...Ch. 14 - Michelson After his first attempt to determine the...Ch. 14 - Prob. 35E Ch. 14 - Prob. 36E Ch. 14 - Prob. 37E Ch. 14 - Hot dogs A nutrition lab tested 40 hot dogs to see...Ch. 14 - Prob. 39E Ch. 14 - Prob. 40E Ch. 14 - Prob. 41E Ch. 14 - Computer lab fees The technology committee has...Ch. 14 - Prob. 43E Ch. 14 - CEO compensation The total compensation of the...Ch. 14 - Prob. 45E Ch. 14 - CEOs, revisited In Exercise 44, you looked at the...Ch. 14 - GPAs A colleges data about the incoming freshmen...Ch. 14 - Prob. 48E Ch. 14 - Lucky spot? A reporter working on a story about...Ch. 14 - Prob. 50E Ch. 14 - Pregnancy Assume that the duration of human...Ch. 14 - Rainfall Statistics from Cornells Northeast...Ch. 14 - Prob. 53E Ch. 14 - Prob. 54E Ch. 14 - Prob. 55E Ch. 14 - Doritos Some students checked 6 bags of Doritos...Ch. 14 - Prob. 57E Ch. 14 - Prob. 58E Ch. 14 - Chips Ahoy! In 1998, as an advertising campaign,...Ch. 14 - Yogurt Consumer Reports tested 11 brands of...Ch. 14 - Prob. 61E Ch. 14 - Prob. 62E Ch. 14 - Prob. 63E Ch. 14 - Wind power Should you generate electricity with...

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Solution Summary: The author explains that the 95% confidence interval for the mean cost of food for one term is (1372, 1562), and the exact spending of each student is already known.

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Chapter 14 Solutions