CDC 2r051 Vol. 3 Statistical Methods

79 Questions | Total Attempts: 92

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CDC 2r051 Vol. 3 Statistical Methods

CDC 2R051 Editon 5 Volume 3. Statistical Methods URE Questions


Questions and Answers
  • 1. 
    (401) A natural number is stated as a positive number that
    • A. 

      Has any actual value from zero to infinity.

    • B. 

      Has its own unique properties.

    • C. 

      Can be added or subtracted.

    • D. 

      Can be summed.

  • 2. 
    (401) What is the value of 5 ÷ 2 × 6?
    • A. 

      0.3.

    • B. 

      8.4.

    • C. 

      15.0.

    • D. 

      30.0.

  • 3. 
    (401) When using natural numbers, a number placed directly behind brackets, with no sign of operation between, indicates that
    • A. 

      You must multiply and divide before adding and subtracting.

    • B. 

      You can perform the calculation with or without the brackets.

    • C. 

      The brackets should be removed before performing the calculation.

    • D. 

      The quantity within the brackets must be multiplied by that number.

  • 4. 
    (401) Which phrase is true regarding signed numbers?
    • A. 

      Only whole numbers are used.

    • B. 

      Negative numbers are not used.

    • C. 

      Dividing by zero is permitted.

    • D. 

      Both positive and negative numbers have values.

  • 5. 
    (401) Compute the difference of the signed numbers –17 – (–10).
    • A. 

      +3.0.

    • B. 

      –3.0.

    • C. 

      –7.0.

    • D. 

      –27.0.

  • 6. 
    (401) How do you write: “The square root of 25 is 5.” as a mathematical expression?
    • A. 

       

    • B. 
    • C. 
    • D. 
  • 7. 
    (402) What is 22 percent of 12?
    • A. 

      1.83.

    • B. 

      2.64.

    • C. 

      18.30.

    • D. 

      26.40.

  • 8. 
    (403) Which statistical technique is an example of descriptive statistics?
    • A. 

      Probability.

    • B. 

      Extrapolation.

    • C. 

      Trend analysis.

    • D. 

      Measurement scales.

  • 9. 
    (404) In the equation Y=X+2, what does the symbol “Y” represent?
    • A. 

      Exponent.

    • B. 

      Inequality.

    • C. 

      Subscript.

    • D. 

      Variable.

  • 10. 
    (404) What is the value of 4^3?
    • A. 

      64.

    • B. 

      24.

    • C. 

      12.

    • D. 

      7.

  • 11. 
    (405) A sample of a population that is taken in such a manner that each value has an equal chance of being selected is referred to as a?
    • A. 

      Biased sample

    • B. 

      Random sample

    • C. 

      Sampling theory

    • D. 

      Sampling application

  • 12. 
    (405) If you construct a QLP retrieval to select every 8th record, you are using which sampling technique?
    • A. 

      Selective

    • B. 

      Stratified

    • C. 

      Systematic

    • D. 

      Purposeful

  • 13. 
    (406) Which measurement scale consists of equal intervals between scale values and an arbitrary zero point?
    • A. 

      Ratio

    • B. 

      Nominal

    • C. 

      Ordinal

    • D. 

      Interval

  • 14. 
    (406) You are given two pieces of test equipment that must be loaded on a pallet. One piece weighs 125 pounds and the other piece weighs 3.5 times as much. Using the ratio measurement scale, how much does the second piece of equipment weigh?
    • A. 

      375.0 pounds

    • B. 

      415.5 pounds

    • C. 

      437.5 pounds

    • D. 

      500.0 pounds

  • 15. 
    (406) Given measurements of 5.0 hours, 10.0 hours, 15.0 hours, and 20.0 hours, what type of data and measurement scale would you use to classify these data items?
    • A. 

      Discrete; ratio

    • B. 

      Discrete; interval

    • C. 

      Continuous; ratio

    • D. 

      Continuous; interbal

  • 16. 
    (407) The second step in making a frequency distribution is to
    • A. 

      Determine the range of the data

    • B. 

      Determine the class interval size

    • C. 

      Range the data from largest to smallest

    • D. 

      Range the data from smallest to largest

  • 17. 
    (407) With a noncumulative frequency distribution range of 3.6, which class interval will give you 18 classes?
    • A. 

      0.1

    • B. 

      0.2

    • C. 

      0.3

    • D. 

      0.4

  • 18. 
    (407) One way of comparing class frequencies to the total frequency is by
    • A. 

      Indirect comparison

    • B. 

      Direct comparison

    • C. 

      Visual inspection

    • D. 

      Percentage

  • 19. 
    (408) What does each rectangle in a histogram represent?
    • A. 

      Value of the data

    • B. 

      One class of data

    • C. 

      Upper and lower limits

    • D. 

      Number of frequencies

  • 20. 
    (408) When constructing a frequency polygon, what are plotted against the corresponding midpoints?
    • A. 

      Series of rectangles

    • B. 

      Individual values of data

    • C. 

      Lower limit and baseline

    • D. 

      Frequencies of the various class intervals

  • 21. 
    (409) What measure of central tendency is the most typical value in a distribution?
    • A. 

      Mean

    • B. 

      Mode

    • C. 

      Median

    • D. 

      Weighted mean

  • 22. 
    (409) The mode is the only measure of central tendency that can be used with what measurement scale?
    • A. 

      Ratio

    • B. 

      Interval

    • C. 

      Ordinal

    • D. 

      Nominal

  • 23. 
    (410) Analysts frequently use the median because it is easy to compute and gives a better picture of data than the mean and mode when data are
    • A. 

      Normal

    • B. 

      Skewed

    • C. 

      Incomplete

    • D. 

      Inconclusive

  • 24. 
    (410) The median cannot be used with data from which measurement scale?
    • A. 

      Nominal

    • B. 

      Interval

    • C. 

      Ordinal

    • D. 

      Ratio

  • 25. 
    (410) What must you do first to determine the median from ungrouped data?
    • A. 

      Arrange the data in classes

    • B. 

      Determine the numerical averages

    • C. 

      Determine the total of the values

    • D. 

      Arrange the data in ascending order

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