Describing Numerical Data
Subtopic-wise questions
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IQR & Five-Number Summary — IQR = Q3 − Q1
1 question
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Central Tendency — mean (x_bar), effect of data corrections
1 question
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Central Tendency — median
1 question
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Central Tendency — arithmetic mean, combined mean computation
1 question
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IQR and Five-Number Summary — IQR = Q3−Q1, outlier fences
1 question
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Measures of Dispersion — population variance formula, algebraic manipulation
1 question
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Measures of Dispersion — standard deviation, consistency interpretation
1 question
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Measures of Dispersion — variance, effect of linear transformation on variance
1 question
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Central Tendency — arithmetic mean; Measures of Dispersion — population standard deviation
1 question
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IQR and Five-Number Summary — range, median, percentiles, IQR computation
1 question
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IQR and Five-Number Summary — quartiles, Q3 computation, top 25% interpretation
1 question
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IQR and Five-Number Summary — IQR = Q3 − Q1
1 question
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Central Tendency — mean; effect of linear transformation (add then multiply) on mean
1 question
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Measures of Dispersion — population variance; effect of adding constant on variance
1 question
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Measures of Central Tendency — mean, median, mode; effect of adding a new observation
1 question
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Measures of Dispersion — range, variance; comparing variability between datasets
1 question
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Measures of Dispersion — sample standard deviation; effect of linear transformation (adding constant) on SD
1 question
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Position Measures — percentiles, computing percentile values
1 question
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Frequency Tables — stem-and-leaf; Central Tendency — mean; effect of multiplying all values by a constant
1 question
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Measures of Dispersion — sample standard deviation formula $s = \sqrt{\sum(x_i-\bar{x})^2/(n-1)}$
1 question
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Central Tendency — mode for categorical and numerical data
1 question
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Frequency Tables — stem-and-leaf plot; Central Tendency — median; Measures of Dispersion — range
0 questions
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Central Tendency — median for even $n$; reading stem-and-leaf plots
1 question
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Measures of Dispersion — range = max $-$ min
1 question