_____ is known as a statistic that measures the variability of a distribution as the average squared deviation of each case from the mean
Answer
Correct Answer:
Variance
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_____ is defined as error that occurs when there is no evidence of a statistical relationship between two variables based on the sample, but in fact, the two variables are related
Answer
Correct Answer:
Type II Error
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_____ is error that occurs when there is evidence of a statistical relationship between two variables based on the sample, but in fact, there is no relationship between the two variables
Answer
Correct Answer:
Type I Error
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Is statistical Significance the mathematical likelihood that an association is due to chance, judged by a criterion set by the analyst (e.g., the probability of an association is due to chance is less than 5 out of 100 or p < .05)?
Answer
Correct Answer:
True
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_____ is known as the square root of the average squared deviation of each case from the mean
Answer
Correct Answer:
eviation
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_____ is defined as the extent to which cases are clustered more at one or the other end of the distribution of a quantitative variable, rather than in a symmetric pattern around its center. Skew can be positive (a right skew), with the number of cases tapering off in the positive direction, or negative (a left skew), with the number of cases tapering off in the negative direction
Answer
Correct Answer:
Skewness
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_____ is defined as a graph of individual response to two continuous variables
Answer
Correct Answer:
Scatterplot
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Is range the true upper limit in a distribution minus the true lower limit (or the highest rounded value minus the lowest rounded value)?
Answer
Correct Answer:
True
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_____ is known as the point in a distribution corresponding to the first 25% of the cases, the first 50% of the cases, and the first 75% of the cases
Answer
Correct Answer:
Quartile
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_____ is defined as a graph with a shape that looks like a bell, with one hump in the middle, centered around the population mean, and the number of cases tapering off on both sides of the mean. This shape is important for sampling and statistical analysis
Answer
Correct Answer:
Normal Distribution
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_____ is statistical tests involving two or more independent variables
Answer
Correct Answer:
Multivariate Statistical Test
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Is mode the most frequent value in a distribution?
Answer
Correct Answer:
True
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_____ is known as the point that divides a distribution in half (the 50th percentile)
Answer
Correct Answer:
Median
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_____ is defined as a type of descriptive statistic that summarizes the strength of an association. See also association
Answer
Correct Answer:
Measure of Association
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_____ is the arithmetic or weighted average computed by adding up the value of all the cases and dividing by the number of cases
Answer
Correct Answer:
Mean
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Is marginal Distribution the summary distributions in the margins of a cross-tabulation that correspond to the frequency distribution of the row variable and the column variable?
Answer
Correct Answer:
True
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_____ is known as the difference in a distribution between the end of the first quartile and the beginning of the third quartile
Answer
Correct Answer:
Interquartile Range
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_____ is defined as a graphic for quantitative variables in which the variable’s distribution is displayed with adjacent bars
Answer
Correct Answer:
Histograms
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_____ is a graphic for quantitative variables in which a continuous line connects data points representing the variable’s distribution
Answer
Correct Answer:
Frequency Polygon
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Is frequency Distribution numerical display showing the number of cases, and usually the percentage of cases (the relative frequencies) corresponding to each value or group of values of a variable?
Answer
Correct Answer:
True
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_____ is known as statistics used to describe the distribution of and relationship among variables
Answer
Correct Answer:
Descriptive Statistics
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_____ is defined as in the simplest case, a bivariate (two-variable) distribution, showing the distribution of one variable for each category of another variable; can also be elaborated using three or more variables
Answer
Correct Answer:
Cross-Tabulation
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_____ is a statistic summarizing the strength of a relationship between two continuous variables
Answer
Correct Answer:
Correlation Coefficient
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Is check Coding a check of the accuracy of coding information; it is estimated by comparing the coding completed by one person with the coding completed by a second person?
Answer
Correct Answer:
True
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_____ is known as the most common value (for variables measured at the nominal level) or the value around which cases tend to center (for a quantitative variable)
Answer
Correct Answer:
Central Tendency
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_____ is defined as statistical tests of the relationship between two variables
Answer
Correct Answer:
Bivariate Statistical Test
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_____ is a graphic for categorical variables in which the variable’s distribution is displayed with solid bars separated by spaces
Answer
Correct Answer:
Bar Chart
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In the following distribution of the variable semesters completed, the respondents reported the following numbers: 4, 3, 1, 0, 3, 3, 4, 0, 3, 2. What is the mode?
Answer
Correct Answer:
3
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Which of the following data displays represent data not as bars, but as connected points in a single line?
Answer
Correct Answer:
Frequency polygon
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The extent to which cases are spread out through the distribution or clustered in just one location is known as the distribution’s:
Answer
Correct Answer:
Variability.
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The process of checking data carefully for errors is known as:
Answer
Correct Answer:
Data cleaning.
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Which of the following do Guidelines for graph representativeness include?
Answer
Correct Answer:
All of the above
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A frequency distribution in which a set of conceptually similar variables having the same response categories are presented together is:
Answer
Correct Answer:
Combined frequency display.
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The mean, or arithmetic average, takes into account the values of each in a distribution.
Answer
Correct Answer:
True
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The mean is the most frequent value in a distribution.
Answer
Correct Answer:
False
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A frequency distribution displays the number or percentage (the relative frequencies), or both, of cases corresponding to each of a variable’s values or group of values.
Answer
Correct Answer:
True
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A bar chart contains solid bars that are shoulder to shoulder on the graph.
Answer
Correct Answer:
False
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