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1) The measure of dispersion is changed by a change of_____________? a. Origin b. Scale c. Algebraic Signs d. None
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2) A measure of dispersion is always ________________? a. Zero b. Positive c. Negative d. Infinity
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3) The algebraic sum of deviations from mean is_____________? a. Maximum b. Zero c. Minimum d. Undefined
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4) You asked five of your classmates about their height. On the basis of this information, you stated that the average height of all students in your university or college is 67 inches. This is an example of ? a. Descriptive statistics b. Inferential Statistics c. Parameter d. Population
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5) Which one of the following measurement does not divide a set of observations into equal parts ? a. Quartiles b. Standard Deviations c. Percentiles d. Deciles e. Median
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6) Which of the following is not based on all the observations ? a. Arithmetic Mean b. Geometric Mean c. Harmonic Mean d. Weighted Mean e. Mode
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7) The height of a student is 60 inches. This is an example of________________? a. Qualitative data b. Categorical data c. Continuous data d. Discrete data
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8) In statistics, a sample means______________? a. A portion of the sample b. A portion of the population c. all the items under investigation d. none of the above
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9) The mean deviation of the values, 18, 12, 15 is____________? a. 6 b. Zero c. 3 d. 2
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10) Which of these is a relative measure of dispersion_____________? a. Standard Deviation b. Variance c. Coefficient of Variation d. None of these
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11) Which one is the not measure of dispersion? a. The Range b. 50th Percentile c. Inter-Quartile Range d. Variance
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12) In statistics, conducting a survey means_____________? a. Collecting information from elements b. Making mathematical calculations c. Drawing graphs and pictures d. None of the above
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13) Which branch of statistics deals with the techniques that are used to organize, summarize, and present the data? a. Advanced Statistics b. Probability Statistics c. Inferential Statistics d. Descriptive Statistics e. Bayesian Statistics
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14) Statistic is a numerical quantity, which is calculated from? a. Population b. Sample c. Data d. Observations
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15) Data in the Population Census Report is____________? a. Grouped data b. Ungrouped data c. Secondary data d. Primary data e. Arrayed data
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16) When data are collected in a statistical study for only a portion or subset of all elements of interest we are using? a. A sample b. A Parameter c. A Population d. Both b and c
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17) In descriptive statistics, we study______________? a. The description of decision making process b. The methods for organizing, displaying, and describing data c. How to describe the probability distribution d. None of the above
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18) In inferential statistics, we study____________? a. the methods to make decisions about population based on sample results b. how to make decisions about mean, median, or mode c. how a sample is obtained from a population d. None of the above
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19) A constant variable can take values______________? a. Zero b. Fixed c. Not fixed d. Nothing
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20) A chance variation in an observational process is_____________? a. Dispersion/ Variability b. Measurement error c. Random error d. Instrument error
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