Concept explainers
(a)
To explain do these data satisfy assumptions for inference.
(a)
Answer to Problem 31E
These data satisfy assumptions for inference.
Explanation of Solution
In the question it is given that, students investigating the packaging of potato chips purchased six bags of Lay’s Ruffles marked with a net weight of
Thus, now we will check if these data satisfy assumptions for inference as:
Random condition: It is satisfied assuming that the six bags were randomly selected.
Independent condition: It is satisfied since the sample of six bags of Lay’s Ruffles is less than
Normal condition: It is satisfied because the histogram shows no outlier and the normal quantile plot is nearly linear.
Thus, all the conditions are met.
(b)
To find the mean and standard deviation of the weight.
(b)
Answer to Problem 31E
The mean is
The standard deviation is
Explanation of Solution
In the question it is given that, students investigating the packaging of potato chips purchased six bags of Lay’s Ruffles marked with a net weight of
The mean of this data is:
The standard deviation of the data is:
(c)
To create a
(c)
Answer to Problem 31E
The confidence interval is:
Explanation of Solution
In the question it is given that, students investigating the packaging of potato chips purchased six bags of Lay’s Ruffles marked with a net weight of
The degrees of freedom is:
The t -value is:
The confidence interval is:
Thus, the confidence interval is:
(d)
To explain in context what your interval means.
(d)
Explanation of Solution
In the question it is given that, students investigating the packaging of potato chips purchased six bags of Lay’s Ruffles marked with a net weight of
The confidence interval is:
(e)
To comment on the company’s stated net weight of
(e)
Explanation of Solution
In the question it is given that, students investigating the packaging of potato chips purchased six bags of Lay’s Ruffles marked with a net weight of
The confidence interval is:
Chapter 23 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
Additional Math Textbook Solutions
Elementary Statistics Using Excel (6th Edition)
Introductory Statistics
Elementary Statistics: Picturing the World (7th Edition)
Intro Stats, Books a la Carte Edition (5th Edition)
Statistical Reasoning for Everyday Life (5th Edition)
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