Statistics > QUESTIONS & ANSWERS > Chapter 3 Describing Data: Numerical Measures( QUESTION & ANSWERS) (All)

Chapter 3 Describing Data: Numerical Measures( QUESTION & ANSWERS)

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Chapter 3 Describing Data: Numerical Measures( QUESTION & ANSWERS)True/False 1. A value that is typical or representative of the data is referred to as a measure of central location. Answer: True 2... . The arithmetic mean is the sum of the observations divided by the total number of observations. Answer: True 3. For a set of data arranged or sorted in numerical order, the value of the observation in the center is called the weighted mean. Answer: False 4. A set of ordinal, interval or ratio level data may only have one mode. Answer: False 5. If a variable is measured at the interval or ratio level, all the values are included when computing the mean. Answer: True 6. A variable measured at the interval or ratio level can have more than one arithmetic mean. Answer: False 7. The mode is the value of the observation that appears most frequently. Answer: True 8. A distribution that has the same shape on either side of the center is said to be symmetrical. Answer: True 9. A negatively skewed distribution is not symmetrical. The long tail is to the left or in the negative direction. Answer: True 10. The geometric mean is the nth root of n observations. Answer: True 11. A statistic is a measurable characteristic of the population. Answer: False 12. A parameter is a measurable characteristic of a sample. Answer: False 13. The median can be determined for any set of interval-level data. Answer: True 14. Extremely high or low scores affect the value of the median. Answer: False 15. The sum of the deviations from the mean for the set of numbers 4, 9 and 5 will equal zero. Answer: True [Show More]

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