a.
To find: The
a.
Answer to Problem 56E
The mean and standard deviation are -1.1 and 1.513.
Explanation of Solution
Given:
For X:
Population mean
Population standard deviation
For Y:
Population mean
Population standard deviation
Calculation:
The mean value and standard deviation of the difference between Y and X can be computed as:
The average difference between the errors is expected to be -1.1
The difference that exists between the two errors on an average is expected to be of -1.1 words and it differs on average of 1.5134 words.
b.
To find: The probability that randomly chosen person is making more word errors than the non-word errors
b.
Answer to Problem 56E
The probability is 0.15.
Explanation of Solution
Calculation:
The possible values of T are:
And,
The probabilities can be calculated as:
And,
Thus,
Thus, the required probability is 0.15.
Chapter 6 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
An Introduction to Mathematical Statistics and Its Applications (6th Edition)
Essentials of Statistics (6th Edition)
Introductory Statistics (2nd Edition)
Introductory Statistics
Elementary Statistics (13th Edition)
Basic Business Statistics, Student Value Edition
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