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18 Cards in this Set
- Front
- Back
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Those methods involving the collection, presentation, and characterization of a set of data in order to properly describe the various features of that set of data are called
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descriptive statistics
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A summary measure that is computed to describe a numerical characteristics from only a sample of the population is called
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A statistic
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A _________ error can be reduced by taking larger sampling sizes
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sampling
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In which of the following sampling methods is the sample randomly selected from, freshmen, sophomores, juniors and seniors
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stratified sample
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A population from for a survey contains a listing of 6,179 names. Using a table of random numbers which of the following code numbers will appear on your list
a) 6946 b) 0694 |
0694
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The grade obtained in a senior level Management class is an example of a _________ variable
continous or categorical |
categorical
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The width of each bar in a histogram corresponds to the..
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boundaries of the classes
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To determine the appropriate width of the class interval in a grouped frequency distribution we...
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divide the range of the data by the number of desired class intervals
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When grouping data into classes it is recommended that we have...
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between 5 and 15 classes
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Which of the following charts would give you information regarding the number of observations "upto and including" a given group
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Ogives
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Another name for "Ogive" is a
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cumulative percentage polygon
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in analyzing categorical data, the following graphical device is not appropriate
a) stem and leaf display or b)Pareto diagram |
stem and leaf display
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Which measure of central tendency can be used for both numerical and categorical variables
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Mode
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which of the following statements about the median is NOT true
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it is more affected by extreme values than the mean
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The value in a data set appears most frequently is called ..
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the mode
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In a perfectly symmetrical distribution...
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the mean equals the median
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The smaller the spread of scores around the means:
A) the smaller the standard deviation B) the smaller the coefficient of variation C) all of the above |
C) all of the above
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In a right-skewed distribution...
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the median is less than the mean
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