Chapter 3 - Central Tendency

1. 1What is the mean for the following sample of scores?
   Scores: 1, 2, 5, 4

   1. A12
   2. B6
   3. C4
   4. D3
2. 2A sample has a mean of M = 45. If one person with a score of X = 53 is removed from the sample, what effect will it have on the sample mean?

   1. AThe sample mean will increase.
   2. BThe sample mean will decrease.
   3. CThe sample mean will remain the same.
   4. DCannot be determined from the information given.
3. 3One sample has n = 8 scores and M = 2. A second sample has n = 4 scores and M = 8. If the two samples are combined, then what is the mean for the combined sample?

   1. A3
   2. B4
   3. C5
   4. D6
4. 4What is the mean for the population of scores shown in the frequency distribution table?

   

   1. A15/10 = 1.5
   2. B15/5 = 3.0
   3. C29/10 = 2.9
   4. D29/5 = 5.8
5. 5After 5 points are added to every score in a distribution, the mean is calculated and found to be μ = 30. What was the value of the mean for the original distribution?

   1. A25
   2. B30
   3. C35
   4. DCannot be determined from the information given
6. 6What is the median for the following set of scores:
   Scores: 3, 4, 6, 8, 9, 10, 11

   1. A7
   2. B7.5
   3. C8
   4. D8.5
7. 7What is the median for the following set of scores:
   Scores: 8, 10, 11, 12, 14, 15

   1. A11
   2. B11.5
   3. C12
   4. D70/6 = 11.67
8. 8For the sample shown in the frequency distribution table, what is the median?

   

   1. A3
   2. B3.5
   3. C4
   4. D15/2 = 7.5
9. 9During the month of October, an instructor recorded the number of absences for each student in a class of n 5 20 and obtained the following distribution. What are the values for the mean, the median, and the mode for this distribution?

   

   1. AMean = 2.35, Median = 2.5, Mode = 3
   2. BMean = 2.5, Median = 3, Mode = 3
   3. CMean = 2.35, Median = 3, Mode = 7
   4. DMean = 2.5, Median = 2.5, Mode = 7
10. 10What is the mode for the following set of n 5 8 scores?
    Scores: 0, 1, 1, 2, 2, 2, 2, 3

    1. A2
    2. B2.5
    3. C13/8 = 1.625
    4. D13

11. 11For the sample shown in the frequency distribution table, what is the mode?

    

    1. A3
    2. B3.5
    3. C4
    4. D5
12. 12A teacher gave a reading test to a class of 5th-grade students and computed the mean, median, and mode for the test scores. Which of the following statements cannot be an accurate description of the scores?

    1. AThe majority of the students had scores above the mean.
    2. BThe majority of the students had scores above the median.
    3. CThe majority of the students had scores above the mode.
    4. DAll of the other options are false statements.
13. 13One item on a questionnaire asks, “How many siblings (brothers and sisters) did you have when you were a child?” A researcher computes the mean, the median, and the mode for a set of n 5 50 responses to this question. Which of the following statements accurately describes the measures of central tendency?

    1. ABecause the scores are all whole numbers, the mean will be a whole number,
    2. BBecause the scores are all whole numbers, the median will be a whole number.
    3. CBecause the scores are all whole numbers, the mode will be a whole number.
    4. DAll of the other options are correct descriptions.
14. 14The value of one score in a distribution is changed from X = 20 to X = 30. Which measure(s) of central tendency is (are) certain to be changed?

    1. AThe mean
    2. BThe median
    3. CThe mean and the median
    4. DThe mode
15. 15Which of the following is true for a symmetrical distribution?

    1. AThe mean, median, and mode are all equal
    2. BMean = Median
    3. CMean = Mode
    4. DMedian = Mode
16. 16For a negatively skewed distribution with a mode of X = 25 and a median of 20, the mean is probably _____.

    1. AGreater than 25
    2. BLess than 20
    3. CBetween 20 and 25
    4. DCannot be determined from the information given
17. 17A distribution is positively skewed. Which is the most probable order for the three measures of central tendency?

    1. AMean = 40, Median = 50, Mode = 60
    2. BMean = 60, Median = 50, Mode = 40
    3. CMean = 40, Median = 60, Mode = 50
    4. DMean = 50, Median = 50, Mode = 50

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Year 1 Statistics I Quiz sobre Chapter 3 - Central Tendency, criado por Eloise Brisson em 10-08-2022.

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Eloise Brisson

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Criado em 10 ago 2022 · atualizado em 10 ago 2022

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