Probs And Stats 1

25 Questions | Total Attempts: 121

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Probs And Stats 1 - Quiz


Questions and Answers
  • 1. 
    What is the best sampling technique to be used for determining the average speed of the cars on a section of the highway?
    • A. 

      Simple Random sample

    • B. 

      Convenience sample

    • C. 

      Systematic sample

    • D. 

      Cluster sampling

  • 2. 
    Mr. Black samples his class by selecting all students sitting in group 1 and group 5 in his classroom. This sampling  method is called
    • A. 

      Stratified

    • B. 

      Cluster

    • C. 

      Simple

    • D. 

      Convenience

  • 3. 
    Mrs. Allen samples her class by selecting every third person on her class list. Which type of sampling method is this?
    • A. 

      Simple

    • B. 

      Systematic

    • C. 

      Cluster

    • D. 

      Stratified

  • 4. 
    Which of the following is discrete data?
    • A. 

      Sam is 160 metres tall

    • B. 

      Sam weighs 60 kg

    • C. 

      Sam ran 100metres in 10 seconds

    • D. 

      Sam has two brothers and one sister

  • 5. 
    Which of the following is continuous data?
    • A. 

      The cat has 2 eyes

    • B. 

      The cat has 2 kittens

    • C. 

      The cat has four paws

    • D. 

      The cat weighs 5.4kg

  • 6. 
    A researcher is interested in the travel time of University students. A group of 50 students in interviewed. Their mean travel time is 16.7 minutes. For this study the mean of 16.7minutes is an example of a
    • A. 

      Parameter

    • B. 

      Population

    • C. 

      Sample  

    • D. 

      Statistic

  • 7. 
    A researcher is interested in the IQ level of the students at the Mico University. The entire group of students is an example of
    • A. 

      Population

    • B. 

      Parameter

    • C. 

      Sample

    • D. 

      Statistic

  • 8. 
    Statistical techniques that summarize and organize data are classified as
    • A. 

      Descriptive statistics

    • B. 

      Inferential statistics

    • C. 

      Population statistics 

    • D. 

      Sample statistics

  • 9. 
    The median is always
    • A. 

      The middle score when results are ranked in order of magnitude

    • B. 

      The same as the mean

    • C. 

      The most frequently occurring score in the data set

    • D. 

      The difference between the maximum and minimum scores

  • 10. 
    What is the mean of the scores : 2, 5, 4, 1, 8?
    • A. 

      4

    • B. 

      3.5

    • C. 

      5

    • D. 

      20

  • 11. 
    What is the mean of the scores shown in the frequency distribution?
    • A. 

      2.9

    • B. 

      5.8

    • C. 

      3.0

    • D. 

      1.5

  • 12. 
    What is the median of the following scores 8, 1, 2, 5, 4?
    • A. 

      4

    • B. 

      3.5

    • C. 

      4.5

    • D. 

      7

  • 13. 
    A teacher gave a statistics test to a group of students and computed the measures of central tendency for the test scores. Which of the following cannot be an accurate description of the scores?
    • A. 

      The majority of students have scores above the median

    • B. 

      The majority of students have scores above the mean

    • C. 

      The majority of students have scores above the mode

    • D. 

      None of the options mentioned

  • 14. 
    Which of the following statements is the most accurate description of standard deviation?
    • A. 

      The total distance from the smallest score to the highest score

    • B. 

      The squared average distance between all scores and the mean

    • C. 

      The square root of the total distance from the smallest score to the highest score

    • D. 

      The average distance between a score and the mean

  • 15. 
    What is the variance of 2, 2, 2,, 2, 2?
    • A. 

      0

    • B. 

      2

    • C. 

      22

    • D. 

      25

  • 16. 
    Which of the following has the greatest range?
    • A. 

      2, 5, 8, 11

    • B. 

      13, 13, 13, 13

    • C. 

      20, 25, 26, 27

    • D. 

      42, 43, 44, 45

  • 17. 
    Which of the following is NOT a measure of dispersion?
    • A. 

      Mean

    • B. 

      Lower quartile

    • C. 

      Standard deviation

    • D. 

      Variance

  • 18. 
    The lengths of cabbage leaves were measured, to the nearest cm, and the information grouped as shown in the table below. The limits of the class intervals are
    • A. 

      Option 3. 8, 12, 17

    • B. 

      5, 5, 5, 5

    • C. 

      9.5, 14.5, 19.5, 24.5, 29.5

    • D. 

      10, 14, 15, 19, 20, 25, 29

  • 19. 
    Among a group of employees, the highest paid receives a weekly wage of $105.40. If the range of the wages is $27.50, how much does the lowest paid employee receive?
    • A. 

      $77.90

    • B. 

      $66.45

    • C. 

      $27.50

    • D. 

      $105.40

  • 20. 
    The bar chart shows the number of students who bought different books, how many students bought exactly 4 books?
    • A. 

      8

    • B. 

      9

    • C. 

      10

    • D. 

      14

  • 21. 
    What is the mode of the distribution shown?
    • A. 

      5

    • B. 

      7

    • C. 

      8

    • D. 

      14

  • 22. 
    Which of the following is NOT a statistical diagram?
    • A. 

      Bar Chart

    • B. 

      Pie Chart

    • C. 

      Frequency polygon

    • D. 

      Modal Class

  • 23. 
    The boundaries of the class interval 10 - 14 are best recorded as
    • A. 

      10 and 14

    • B. 

      9.5 and 10

    • C. 

      9.5 and 14.5

    • D. 

      10.5 and 14.5

  • 24. 
    The semi interquartile range is
    • A. 

      The difference between the upper and lower boundaries

    • B. 

      The difference between the upper and lower quartiles

    • C. 

      Half the difference between the upper and lower quartiles

    • D. 

      Half of the difference between the upper and lower boundaries

  • 25. 
    The table shows the masses of 50 people. calculate the mean mass
    • A. 

      51.3

    • B. 

      52.3

    • C. 

      53.0

    • D. 

      53.5

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