Computing and Understanding Averages in Statistics MCQ
A level of measurement defined as having an ____ zero.
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Correct Answer:
Absolute
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An interval level of measurement that places a variable’s values into categories that are equidistant from each other, as when points are evenly spaced along a scale.
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Correct Answer:
True
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A ordinal level of measurement that places a variable’s value into a category and assigns that category an order with respect to other categories.
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Correct Answer:
True
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____ is the gross level of measurement by which a variable’s value can be placed in one and only one category.
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Correct Answer:
Nominal level of measurement
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Different ways of categorizing measurement outcomes: nominal, ordinal, interval, and ratio is called scale of measurements.
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Correct Answer:
True
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Data point is an ____
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Correct Answer:
Observation
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____ is most frequently occurring score in a distribution
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Correct Answer:
Mode
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Whether a score is an outlier or not is usually an arbitrary decision made by the researcher.
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Correct Answer:
True
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The quality of a distribution that defines the disproportionate frequency of certain scores is called
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Correct Answer:
Skew
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The percentage of cases equal to and below a particular score in a distribution or set of scores is called percentile ranks.
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Correct Answer:
True
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A measure of central tendency calculated by summing all the scores and ____ by the number of scores.
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Correct Answer:
Dividing
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A type of average calculated by summing values and dividing that sum by the number of values is known as
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Correct Answer:
Mean
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The mean, the median, and the mode is included in measure of central tendency
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Correct Answer:
True
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The most representative score in a set of scores is called
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Correct Answer:
Average
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A number that characterizes the “middleness” of an entire distribution is ______.
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Correct Answer:
A measure of central tendency
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This is calculated by multiplying values by the frequency of their occurrence, adding the total of all the products, and then dividing by the total number of occurrences:
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Correct Answer:
Weighted mean
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What is another way of describing "measures of central tendency"?
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Correct Answer:
Averages
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A number that characterizes the “middleness” of an entire distribution is ______.
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Correct Answer:
A measure of central tendency
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This is calculated by multiplying values by the frequency of their occurrence, adding the total of all the products, and then dividing by the total number of occurrences:
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Correct Answer:
Weighted mean
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What is another way of describing "measures of central tendency"?
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Correct Answer:
Averages
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If a distribution is "significantly distorted" what is this called?
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Correct Answer:
Skew
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This measure of central tendency can be considered the least precise:
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Correct Answer:
Mode
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The ______ is calculated by summing all of the numbers in a distribution and dividing by the total number of scores.
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Correct Answer:
Mean
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Seven students reported the following individual earnings from their sale of books: $7, $13, $3, $5, $2, $9, and $3. In this distribution of individual earnings, the mean is ______ the mode and ______ the median.
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Correct Answer:
Greater than; equal to
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During the past year, Cindy and Bobby each read 2 books, but Greg read 25, Jan read 12, and Marcia read 9. The median number of books read by these individuals is ______.
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Correct Answer:
9
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This measure of central tendency can be considered the most precise:
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Correct Answer:
Mean
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Imagine that 86,999 penniless people live in the town of Centerville. Bill Gates, whose net worth is $87,000,000,000 moves into Centerville. Now the mean net worth is ______ and the median net worth is ______.
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Correct Answer:
$1,000,000; 0
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The value that best represents an entire group of scores is the ______.
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Correct Answer:
Average
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Seven students reported the following individual earnings from their sale of books: $7, $13, $3, $5, $2, $9, and $3. In this distribution of earnings, the mean is ______.
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Correct Answer:
6
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