Concept explainers
(a)
The population mean for students attitude towards the school and study habits.
(a)
Answer to Problem 13E
There is a chance of 1.01% of obtaining a sample mean of 125.7 or more when the population mean is equal to 115.
Explanation of Solution
Given Information:
Population mean
Number of sample
New population value
Standard deviation
Population proportion valueis 0.0101. Convert 0.0101 into percentage.
From exercise 3 population mean valueis 115.
Thus, null hypotheses
Alternative hypotheses
Hence, if the population mean is equal to 115, then there is a chance of 1.01% of obtaining a sample mean of 125.7 or more.
(b)
Explain whether the null hypothesis can be reject or not when
(b)
Answer to Problem 13E
When
Explanation of Solution
From 13(a), population proportion is 0.0101. If p value is smaller than significant level of 0.05 and 0.01, then the null hypothesis is rejected.
p value when
Thus,
For
Thus,
Hence, when
Chapter 9 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Essentials of Statistics, Books a la Carte Edition (5th Edition)
Introductory Statistics (2nd Edition)
Introductory Statistics (10th Edition)
Essentials of Statistics (6th Edition)
Statistics: The Art and Science of Learning from Data (4th Edition)
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