Statistics > EXAM PROCTORED > statistical midterm exam questions and correct answers highlighted (All)

statistical midterm exam questions and correct answers highlighted

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What is a sample statistic, what is a population parameter, and what is the difference between them? What is a sample statistic? A. A sample statistic is a range of likely values that a population p... arameter could take. B. A sample statistic is a numerical value describing some attribute of a population. C. A sample statistic is a numerical value describing some attribute of a sample. This is the correct answer D. A sample statistic is a portion of the entities of interest that the researcher uses to gather data. What is a population parameter? A. A population parameter is a numerical value describing some attribute of a population. B. A population parameter is a numerical value describing some attribute of a sample. C. .A population parameter is a portion of the entities of interest that the researcher uses to gather data. D. D.A population parameter is a range of likely values that a sample statistic could take. What is the difference between a sample statistic and a population parameter? A. A population parameter is frequently impractical or impossible to find for large populations, however a sample statistic is often easier to find and provides a reasonable approximation to the population parameter. B. A sample statistic is frequently impractical or impossible to find for large samples, however a population parameter is often easier to find and provides a reasonable approximation to the sample statistic. C. A sample statistic is a subset of a population parameter. A population parameter is a subset of a sample statistic. E. There is no difference between a sample statistic and a population parameter. The following table gives the total area in square miles (land and water) of seven states. Complete parts (a) through (c). State Area 1 52,100 2 615,100 3 114,500 4 53,200 5 158,900 6 104,700 7 5,800 a. Find the mean area and median area for these states. The mean is 157,757 square miles. (Round to the nearest integer as needed.) The median is 104,700 square miles. b. Which state is an outlier on the high end? If you eliminate this state, what are the new mean and median areas for this data set? State 2 is an outlier on the high end. The new mean is 81,533 square miles. (Round to the nearest integer as needed.) The new median is 78,950 square miles. (Round to the nearest integer as needed.) c. Which state is an outlier on the low end? If you eliminate this state, what are the new mean and median areas for this data set? State 7 is an outlier on the low end. [Show More]

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