a.
To find: The mean of the sampling distribution of
a.
Answer to Problem 35E
The mean is 0.70.
Explanation of Solution
Given:
The mean of the sampling distribution can be calculated as:
Here, mean is 0.70 because of the unbiased estimator property.
b.
To find: The standard deviation of the sample proportion.
b.
Answer to Problem 35E
The standard deviation is 0.0144052
Explanation of Solution
Calculation:
The standard deviation of the sample proportion is computed as:
Thus, the standard deviation is 0.0144052.
c.
To find: Whether the normality assumptions are satisfied or not.
c.
Explanation of Solution
Here,
Thus, normal approximation could be used here.
d.
To find: The
d.
Answer to Problem 35E
The probability is 0.0188.
Explanation of Solution
Calculation:
The probability that fewer or 67% are saying that they drink cereal milk is computed as:
Here, probability is less than 0.05. Thus, there is doubt on the occurrence of the
Chapter 7 Solutions
The Practice of Statistics for AP - 4th Edition
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