Concept explainers
a)
To explain whether the conditions for calculating a confidence interval for the population mean.
a)
Answer to Problem 65E
The condition of random sample is not met.
Explanation of Solution
Given:
n=32
The population of all students.
The members of AP statistics class is chooses as per convenience and therefore it could not be random sample. Hence the condition of random sample not met.
The sample should be less than 10% of the population. Here, 32students are less than 10% of the all students. Hence, this condition met.
The
b)
To explain whether the conditions for calculating a confidence interval for the population mean.
b)
Answer to Problem 65E
All the conditions are met.
Explanation of Solution
Given:
n=100
The population of all home sales in the city.
The home sales were randomly selected so it is random sample. The condition of random sample met.
The sample should be less than 10% of the population. Here, 100 students are less than 10% of all population of home sales in the city. Hence, this condition met.
The sample size is 100 which is greater than 30 so sample size is larger. Therefore, larger sample size condition satisfied.
Chapter 8 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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