tinuous data.","points":null},{"id":"d0e06cee-773c-4752-bded-5c11bcaa996d","cardType":"cloze","front":"In a bar chart, [ ] shows frequency; in a histogram, [ ] shows frequency.","back":"In a bar chart, height shows frequency; in a histogram, area shows frequency.","points":null},{"id":"3a0ffd0f-6be0-4ff1-94a8-4f67ca85b7f0","cardType":"cloze","front":"In a histogram, bar width is [ ] and bar height is [ ].","back":"In a histogram, bar width is class width and bar height is frequency density.","points":null},{"id":"afb26de1-b768-4a90-beb5-883e428982be","cardType":"cloze","front":"The interval $0 \\le t < 5$ includes 0 but not [ ].","back":"The interval $0 \\le t < 5$ includes 0 but not 5.","points":null},{"id":"bac3e4c3-edb3-4c72-b4da-f10d6506861b","cardType":"cloze","front":"Class width = [ ].","back":"Class width = upper boundary - lower boundary.","points":null},{"id":"f380eb58-8978-4016-9807-d00bca295c84","cardType":"cloze","front":"A histogram’s vertical axis shows [ ] and its horizontal axis shows [ ].","back":"A histogram’s vertical axis shows frequency density and its horizontal axis shows class intervals.","points":null},{"id":"d5112cdb-70ca-48c1-8e89-4da8e1eb5b7b","cardType":"basic","front":"Why do neighbouring histogram bars normally touch?","back":"The data is continuous.","points":2},{"id":"bfdfac25-c27e-45ba-a14d-ede2985e6317","cardType":"basic","front":"Find the class width of $4 \\le t < 9$.","back":"5","points":1},{"id":"a8a2590c-9745-41a1-af38-796c067a2c15","cardType":"basic","front":"What formula gives frequency from class width and frequency density?","back":"$\\text{frequency}=\\text{class width}\\times\\text{frequency density}$","points":1},{"id":"60b04f82-b617-4c34-90cf-2fcd5d644b9b","cardType":"basic","front":"A bar covers 5 to 13 hours with frequency density 2.5. Find the frequency.","back":"20","points":2},{"id":"ec787a99-d613-4c18-b691-7ed672d11ec1","cardType":"basic","front":"Why is height alone not the frequency when class widths are unequal?","back":"Frequency is area: width $\\times$ height.","points":2},{"id":"2f6e8f05-973b-48b5-ba2a-18f9060646c9","cardType":"basic","front":"What formula gives frequency density from frequency and class width?","back":"$\\text{frequency density}=\\dfrac{\\text{frequency}}{\\text{class width}}$","points":1},{"id":"25a05ca1-784b-42db-8b66-003923ff943b","cardType":"basic","front":"A class has frequency 24 and class width 6. Find the frequency density.","back":"4","points":1},{"id":"97eb9fd6-0197-41a9-b5dd-4ff134bd9243","cardType":"basic","front":"Before choosing the vertical scale for a histogram, what value should you check?","back":"The largest frequency density.","points":1},{"id":"9ca8d664-a51c-477f-b617-1db0ef109024","cardType":"basic","front":"A bar covers 15 to 20 with frequency density 3.6. Find the frequency.","back":"18","points":2},{"id":"216ab1e5-f24e-451b-be1b-6a85cd8a14e1","cardType":"basic","front":"Two bars have the same height. One class is twice as wide. How do the frequencies compare?","back":"The wider class has twice the frequency.","points":2},{"id":"d71fd20b-a71b-4d71-9a56-46aa74557cfb","cardType":"basic","front":"Missing frequency: interval 10 up to 18, frequency density 0.75.","back":"6","points":2},{"id":"848dfc90-1e8c-4bf4-a04b-ec26e49802dc","cardType":"basic","front":"Missing frequency density: interval 18 up to 30, frequency 18.","back":"1.5","points":2},{"id":"5fd4e71f-c7d6-419a-8426-5d8c8c090976","cardT

Histograms Flashcards

Histograms Flashcards

Histograms Flashcards

Histograms Flashcards