a.
To explain: The reason of not computing the
a.
Answer to Problem 12PT
Because distribution is not known.
Explanation of Solution
Given:
Here, it has been provided that the population is not approximately
b.
To find: The mean and standard deviation of the sampling distribution
b.
Answer to Problem 12PT
The required mean and standard deviation are 28 and 0.4772 respectively.
Explanation of Solution
The mean and standard deviation can be calculated as:
The required mean and standard deviation are 28 and 0.4772 respectively
c.
To explain: The shape of the sampling distribution.
c.
Explanation of Solution
The central limit theorem states that sampling distribution of sample mean follows the normal distribution if the
The sample size is higher than 30. Thus, the sample mean is approximately normally distributed.
d.
To find: The probability that average fee exceeds $29.
d.
Answer to Problem 12PT
The probability is 0.0125.
Explanation of Solution
The probability that average fee exceeds $29.can be calculated as:
Thus, the probability is 0.0125
Chapter 7 Solutions
The Practice of Statistics for AP - 4th Edition
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