Statistical Methods for Political Analysis (PSCI 2312) Homework # 4 [Due on Frid

Question

Statistical Methods for Political Analysis (PSCI 2312) Homework # 4 [Due on Friday Sep. 28, by 5 pm! True or False (Questions 1 -6) and Multiple Choices (Questions 7-12) 1. Extreme scores in a negatively skewed distribution fall on the left side of the distribution 2. A positively skewed distribution has extreme scores on the right. Nominal variables cannot logically be presented in a grouped frequency distribution. 3. 4. 5. 6. 7. The mode can be used for all levels of measurement The median can be used only for interval level of measurement. The mean can be used for ordinal level of measurement. In a bimodal distribution of scores, central tendency is best measured by: a. the mean b. the median c. the mode d. none Which measure of central tendency is most appropriate for a skewed distribution? a. the mean 8. b. the median c. the mode d. none Which measure of central tendency is most appropriate for a symmetrical distribution? a. the mean 9. b. the median c. the mode d. none 10. A distribution with an equal mean, median, and mode is said to be: b. multimodal c. symmetrical d. none a. bimodal 11. Variability refers to: b. the dispersion of scores in data d. Association of data c. the a. the number of scores in data precision of the mean 12. Standard deviation can be used for variables measured at which level of measurement? a. ordinal level b. nominal level c. interval level d. none

Explanation / Answer

Ans 1)

In case of negatively skewed distrubutions lower values are larger than the higher values hence we have larger tails on left side of distribution hence the given state is TRUE

Ans 2)

Simlalr case the positive skewed distribution in which extreme values lie on right side of distribution therefore this statement is also TRUE

Ans 4)

The Mode can be used for any level of measurement such as (Nominal , Ordinal, Interval or ratio)

Hence TRUE

Ans 5)

Median can be used for Ordinal and Interval level of measurement hence statement is FALSE

Ans 7)

In Binomial distribution is generally measured by Mean

Ans 8)

For skewed distribution Median would be the better measurment for central tendancy

Ans 9)

The Mean

Ans 10)

Symmetrical ( Nomral distribution is such example)

Ans 11)

Option B (Dispersion of data)

Ans 12)

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