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Unformatted text preview: 1. When a random sample is to be taken from a population and a statistic is to be computed, the statistic can also be thought of as A) a parameter. B) a random variable. C) a standard error. D) a sample. 2. Which of the following statements best describes the relationship between a parameter and a statistic? A) A parameter has a sampling distribution with the statistic as its mean. B) A parameter has a sampling distribution that can be used to determine what values the statistic is likely to have in repeated samples. C) A parameter is used to estimate a statistic. D) A statistic is used to estimate a parameter. 3. Sleep apnea is a condition involving irregular breathing during sleep. Suppose that about 20% of a random sample of n = 64 men experience sleep apnea. What is the standard error of the sample proportion? A) 0.125 B) 0.05 C) 0.10 D) 0.20 4. Based on the 2000 Census, the proportion of the California population aged 15 years old or older who are married is p = 0.524. Suppose n = 1000 persons are to be sampled from this population and the sample proportion of married persons (-hat) is to be calculated. What is the standard deviation of the sampling distribution of -hat?population and the sample proportion of married persons (-hat) is to be calculated....
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- Fall '08