k":"In a frequency table, 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