,"back":"Frequency","points":1},{"id":"72515c53-913c-4a41-8bc4-bba3f756f55a","cardType":"basic","front":"What is the formula for frequency density?","back":"$$$\\frac{\\text{frequency}}{\\text{class width}}$$","points":1},{"id":"f0450ef1-b310-44a4-9131-93c56b6f1d81","cardType":"cloze","front":"In a histogram, the vertical axis represents [ ], not frequency.","back":"In a histogram, the vertical axis represents frequency density, not frequency.","points":null},{"id":"b3e5b904-58cc-49fe-896f-90d8b8c2b360","cardType":"basic","front":"How do you calculate the horizontal scale on a drawn histogram (cm per unit)?","back":"$$$\\frac{\\text{drawn width in cm}}{\\text{true class width}}$$","points":2},{"id":"5d4adf5a-c27f-4d08-b87f-5d68b155e510","cardType":"basic","front":"Why are histogram height and width scales calculated independently?","back":"Frequency is represented by area, so height must represent frequency density specifically.","points":2},{"id":"89addf6f-50a7-4d9a-ac4e-7073edd28504","cardType":"cloze","front":"The interquartile range (IQR) represents the spread of the middle [ ] of the data.","back":"The interquartile range (IQR) represents the spread of the middle 50% of the data.","points":null},{"id":"29cc3768-4ede-42bb-ac1d-8a9b420514c7","cardType":"basic","front":"How do you calculate the IQR from quartiles?","back":"$$Q_3 - Q_1$","points":1},{"id":"3b7a1fc2-d5b0-4089-b644-788979a9d1f3","cardType":"basic","front":"What is the lower fence formula for identifying outliers?","back":"$$Q_1 - 1.5 \\times \\text{IQR}$","points":1},{"id":"bcbe34bf-5fd9-4352-b23d-10e7b4a398a5","cardType":"basic","front":"What is the upper fence formula for identifying outliers?","back":"$$Q_3 + 1.5 \\times \\text{IQR}$","points":1},{"id":"cc957a5b-b4cc-4183-91fc-fa9abd1b9518","cardType":"basic","front":"Where do the whiskers stop on a box plot if outliers are present?","back":"At the smallest and largest non-outlier values.","points":1},{"id":"ee398a28-a7a1-4f64-a310-a85ea335b972","cardType":"cloze","front":"On a box plot, outliers are typically plotted separately using [ ].","back":"On a box plot, outliers are typically plotted separately using crosses.","points":null},{"id":"37313a78-4e1c-469b-9447-70c4906f5c5d","cardType":"basic","front":"List three features to compare when describing two distributions using box plots.","back":"

Location (compare medians)
Spread (compare IQRs or ranges)
Outliers (mention any in context)

","points":3},{"id":"6f5cf900-37b7-432d-9712-95e4a52a745b","cardType":"basic","front":"When are the median and IQR preferred over the mean and standard deviation?","back":"When data are skewed or contain outliers.","points":2},{"id":"71e429c8-c259-47c0-b195-868e93f9fe38","cardType":"basic","front":"What is the formula for standard deviation using summary statistics?","back":"$$$\\sqrt{\\frac{\\sum x^2}{n} - \\bar{x}^2}$$","points":1},{"id":"17d4f311-909d-4a00-9255-52c4e21c4592","cardType":"cloze","front":"A variable is measured to the nearest whole number. The class 11-18 has true boundaries of [ ] and 18.5.","back":"A variable is measured to the nearest whole number. The class 11-18 has true boundaries of 10.5 and 18.5.","points":null},{"id":"c418c9c5-0ecc-4b8c-9c73-75027a10848b","cardType":"cloze","front":"A variable is measured to the n

Representations of Data Flashcards

Representations of Data Flashcards

Representations of Data Flashcards

Representations of Data Flashcards