Concept explainers
a.
To find: The
a.
Answer to Problem 56E
The probability is 0.3557.
Explanation of Solution
Given:
Formula used:
The formula to compute the z -score is:
Where,
x is raw score
µ is population mean
s is population standard deviation.
Calculation:
Consider, X be the random variable follows the
The probability that randomly selected student would score 23 or more can be computed as:
Thus, the required probability is 0.3557.
b.
To find: The probability that mean score of 50 students is 23 or above.
b.
Answer to Problem 56E
The probability is 0.3974.
Explanation of Solution
Calculation:
The probability that mean score of 50 students is 23 or above is calculated as follows:
Thus, the required probability is 0.3974.
Chapter 7 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Basic Business Statistics, Student Value Edition
Introductory Statistics
Elementary Statistics (13th Edition)
Fundamentals of Statistics (5th Edition)
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