a.
Whether the statement is a parameter or a statistic.
a.
Answer to Problem 6E
The statement is a parameter.
Explanation of Solution
Given information:
Voters registered as Democrats
Registered Democrats of the voters contacted
Know that a descriptive measure for a population is known as a parameter. Also, a descriptive measure for a sample is known as a statistic.
Here, the voters registered as Democrats is a descriptive measure for a population. This means that it cannot be a statistic and it is a parameter.
Also, the population proportion is,
Hence, the statement is a parameter.
.
The appropriate notation to describe each number.
.
Answer to Problem 6E
The notation of the population proportion is
Explanation of Solution
Know that a descriptive measure for a population is known as a parameter. Also, a descriptive measure for a sample is known as a statistic.
Here, the registered Democrats of the voters contactedare a descriptive measure for sample.
Also, the sample proportion is,
Hence, the notation of the population proportion is
Chapter 7 Solutions
The Practice of Statistics for AP - 4th Edition
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