trong>frequency means how many times a value, score, result or group occurs.","points":null},{"id":"1d10b80f-ebef-4dbb-b69c-cd7208b5306f","cardType":"basic","front":"When finding the mean from an exact frequency table, what do you multiply each value by?","back":"Its frequency.","points":1},{"id":"74cdb423-84c5-4cac-8479-67724791a0be","cardType":"basic","front":"For a mean from a frequency table, what do you divide the total of value × frequency by?","back":"The total frequency.","points":1},{"id":"3d2580cf-ede0-4ca5-a581-042c66fd1f58","cardType":"cloze","front":"For an exact frequency table, $$\\text{mean}=\\frac{\\sum(\\text{value}\\times\\text{frequency})}{\\sum\\text{frequencies}}$$ so you must divide by [ ], not [ ].","back":"For an exact frequency table, $$\\text{mean}=\\frac{\\sum(\\text{value}\\times\\text{frequency})}{\\sum\\text{frequencies}}$$ so you must divide by total frequency, not the number of rows.","points":null},{"id":"807a455b-4e69-4441-80a3-9284284d6409","cardType":"basic","front":"Why is averaging only the first column of a frequency table wrong?","back":"It ignores frequencies.","points":1},{"id":"49a71459-0c3b-4b85-9ae4-6345dac8550f","cardType":"basic","front":"In a frequency table, how do you identify the mode?","back":"Choose the value with the highest frequency.","points":1},{"id":"0ae9905c-32ee-4033-9f97-54a7eae90d6c","cardType":"basic","front":"What is cumulative frequency used for when finding a median from a frequency table?","back":"To locate the middle value.","points":1},{"id":"583cc63e-b391-411f-b211-baa896fa22dc","cardType":"cloze","front":"Cumulative frequency is the [ ] of the frequencies as you move down a table.","back":"Cumulative frequency is the running total of the frequencies as you move down a table.","points":null},{"id":"f5e85b7a-5591-4be3-9a76-5a78add57d0b","cardType":"basic","front":"For 38 values, which positions are used to find the median?","back":"The 19th and 20th values.","points":1},{"id":"ecadf524-7b1e-4c6c-8067-368ef7c9cc97","cardType":"basic","front":"In the goals table with cumulative frequency up to 1 goal equal to 21, why is the median 1 goal?","back":"The 19th and 20th values are in that row.","points":2},{"id":"50cd9b78-9500-41d6-aece-22605f5e975c","cardType":"basic","front":"If total goals are 54, known contribution is 28, and the 2-goal frequency is $x$, what equation is formed?","back":"$$2x+28=54$","points":1},{"id":"f33aa770-6acf-426d-b518-07c3a5779eec","cardType":"basic","front":"Solve $2x+28=54$.","back":"$$x=13$","points":1},{"id":"b2cf74d6-af69-4f86-b0f2-5242720b2403","cardType":"basic","front":"Why can’t an exact mean be found if an open-ended class has non-zero frequency?","back":"The exact values are unknown.","points":1},{"id":"b9134067-edc4-4fba-8b36-22573fb8113e","cardType":"cloze","front":"Grouped data is shown in [ ] rather than exact individual values.","back":"Grouped data is shown in intervals rather than exact individual values.","points":null},{"id":"d8b626bc-fd3c-43e5-9d7e-1529cda3cc22","cardType":"basic","front":"For grouped data, what value represents each class when estimating the mean?","back":"The class midpoint.","points":1},{"id":"48bce5e7-7d16-4cf9-99d5-59e725e09633","cardType":"basic","front":"What is the midpoint of $180190$","points":1},{"id":"1dd74076-091c-4be0-b181-3f159b4e741f","cardType":"cloze","front":"For grouped data, $$\\text{estimated mean}=\\frac{\\sum(\\text{midpoint}\\times\\text{frequency})}{\\sum\\text{frequencies}}$$ because values in each class are treated as if they are at the [ ]

Averages from Frequency Tables Flashcards

Averages from Frequency Tables Flashcards

Averages from Frequency Tables Flashcards

Averages from Frequency Tables Flashcards