The owner of Limp Pines Resort wanted to know the average age of its clients. A random sample of 25 tourists is taken. It shows a mean age of 46 years with a standard deviation of 5 years. The width of a 98 percent CI for the true mean client age is approximately: A. ± […]
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The Central Limit Theorem (CLT) implies that: A. the population will be approximately normal if n = 30.B. repeated samples must be taken to obtain normality.C. the distribution of the mean is approximately normal for large n.D. the mean follows the same distribution as the population. The correct answer and explanation is : The correct
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A body temperature of 96.5 degree F given that human body temperatures have a mean of 98.20 degree F and a standard deviation of 0.62 degree. A) -1.7: not usual B) 2.7: unusual C) -2.7: not unusual D) -2.7: unusual The correct answer and explanation is : To determine if a body temperature of 96.5°F
The width of a confidence interval for µ is not affected by: A. the sample size.B. the confidence level.C. the standard deviation.D. the sample mean. The correct answer and explanation is : The correct answer is D. the sample mean. Explanation: A confidence interval (CI) is a statistical range, derived from sample data, that is
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Which statement is most nearly correct, other things being equal? A. Doubling the sample size will cut the standard error of the mean in half.B. The standard error of the mean depends on the population size.C. Quadrupling the sample size roughly halves the standard error of the mean.D. The standard error of the mean depends
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Explain, giving reasons, which is more important, applied or basic research. The correct answer and explanation is : Both applied and basic research are crucial for the advancement of knowledge and technology, but they serve different purposes and are important in distinct ways. Determining which is “more important” depends on the context in which the
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Which of the following statements about genital herpes is TRUE? A After infection, the virus lies dormant in nerve cells and can reactivate at any time.B The virus can be transmitted to a sex partner even if no lesions are present.C Genital herpes is a major risk factor in the transmission of HIV worldwide.D All
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A firm is operating beyond minimum efficient scale in a perfectly competitive industry. To maintain long-term viability, the most likely course of action for the firm is to: A. operate at the current level of production. B. increase its level of production to gain economies of scale. C. decrease its level of production to the
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As the sample size increases, the standard error of the mean: A. increases.B. decreases.C. may increase or decrease. The correct answer and explanation is : The correct answer is: B. decreases. Explanation: The standard error of the mean (SE) refers to the measure of how much the sample mean (average) is expected to vary from
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A sampling distribution describes the distribution of: A. a parameter.B. a statistic.C. either a parameter or a statistic.D. neither a parameter nor a statistic. The correct answer and explanation is : The correct answer is: B. a statistic. Explanation: A sampling distribution describes the distribution of a statistic that is computed from multiple samples drawn
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