1. The most common measures of variability are the variance and standard deviation.
Answer
Correct Answer:
True
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2. In either grouped or ungrouped data, the most frequent attribute is the ______.
Answer
Correct Answer:
Mode
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3. The College of Liberal Arts and Social Science at Wayne State University has nine departments. The number of faculty in each department is shown here: 8, 12, 9, 15, 17, 11, 13, 14, 7. What is the median number of faculty in departments in the College of Liberal Arts and Social Science?
Answer
Correct Answer:
12
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4. The most frequently used number in a database is the ______.
Answer
Correct Answer:
Mode
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5. The ______ is known to visually depict relationships and patterns among variables.
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Correct Answer:
Graph
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6. The ______ is the difference between the largest and the smallest numbers in the set.
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Correct Answer:
Range
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7. Creating a ______ will help a researcher observe the key characteristics of participants in the sample.
Answer
Correct Answer:
Frequency distribution
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8. The degree to which data in a data set spread out or deviate from the center is called variability.
Answer
Correct Answer:
True
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9. If a researcher wishes to show multiple distributions in the same category simultaneously, which of the following is best suited for this?
Answer
Correct Answer:
Line graph
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10. When distributions lack the perfect symmetry of having the mean, median, and mode in the center, and are symmetric in their shape when viewed as a histogram, what are they termed?
Answer
Correct Answer:
Skewed distribution
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11. A researcher wants to express the middle of a distribution of numbers, such that half the cases are higher than and half lower than a certain number. The correct statistical measure to use would be the ______.
Answer
Correct Answer:
Median
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12. The mean, median, and mode are all measures of central tendency used by researchers.
Answer
Correct Answer:
True
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13. To measure how spread out a distribution is from the mean, a researcher would usually use the standard deviation and the variance.
Answer
Correct Answer:
True
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14. Statistical analysis that allows scientists to confidently make accurate statements about a population is called ______.
Answer
Correct Answer:
Inferential statistics
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15. Which of the following is one advantage of using the cumulative percent?
Answer
Correct Answer:
Its ability to group aggregate numbers and group categories together to display the collective percentage of two or more categories together
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16. A measure of how spread out every point in the variable is from the mean is known as ?
Answer
Correct Answer:
Variance
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17. The analysis of only two variable; often descriptive in nature is known as Univariate Analysis.
Answer
Correct Answer:
False
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18. Statistics is a branch of mathematics in which illogic is used to interpret phenomena and draw antechambers from accumulated data.
Answer
Correct Answer:
False
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19. ______from the mean is known as Standard Deviation .
Answer
Correct Answer:
Deviation
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20. Asymmetrical distribution, in which the distribution is aligned to the left or right is known as Skewness .
Answer
Correct Answer:
False
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21. Errors or mistakes that happen during data collection is known as sampling errors
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Correct Answer:
True
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22. ______ is an imaginary line that best reflects the data points
Answer
Correct Answer:
Regression Line
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23. Identifies the line that best describes the relationship is known as regression
Answer
Correct Answer:
True
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24. The difference between the maximum values in a set of numbers are known as range
Answer
Correct Answer:
False
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25. Random Error that happens _______during the process of handling data
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Correct Answer:
Randomly
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26. Random Error that happens _______during the process of handling data
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Correct Answer:
Randomly
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27. Division of a distribution into quarters are known as Quartiles
Answer
Correct Answer:
True
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28. A graphical representation of the distribution of ______variable is known as Pie Chart
Answer
Correct Answer:
One
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29. Outliers are extreme values in a variable either only too high.
Answer
Correct Answer:
True
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30. Number that occurs with the lowest frequency in a distribution is known as mode
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Correct Answer:
False
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31. Middle point in a distribution is known as median
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Correct Answer:
True
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32. Measures of Central Tendency summarize an entire variable in a double value that is numerically representative of this variable.
Answer
Correct Answer:
False
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33. A line connecting points in a distribution is known as ?
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Correct Answer:
Line Graph
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34. Analysis that provides a deeper understanding of variables because it draws conclusions about the population from the sample is known as______Analysis
Answer
Correct Answer:
Both a and b
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35. ________ is a graphical representation that presents the frequency of a variable in the form of distinct but connected bars
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Correct Answer:
Histogram
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36. A simple procedure that can illustrate key characteristics of participants in the sample is known as ?
Answer
Correct Answer:
Frequency Distribution
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37. ________ analysis that allows researchers to sketch the details of variables and gain familiarity with the sample
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Correct Answer:
Descriptive Analysis
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38. The collective percentage of categories together is known as ?
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Correct Answer:
Cumulative Percent
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39. Correlation is used to determine the extent to which five quantitative variables approximate a linear relationship is known as Correlation .
Answer
Correct Answer:
False
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40. Used to investigate the relationship between one variable is known as Bivariate Analysis.
Answer
Correct Answer:
False
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41. A graphical representation that uses vertical bars to represent each variable is known as Bar Graph?
Answer
Correct Answer:
True
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