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[DOCX File]Psychology 510/511 Lecture 3
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Compute using the median formula. Q1The median of the lower half of the distribution.. (If N is odd, include the overall median in the lower half.) Q0The smallest score in the distribution. Interquartile Range:The distance (on the number line) between the Q1 and Q3 - between the first . quartile and the third quartile. IQR = Q3 - Q1. Interpretation
excel interquartile range formula

[DOC File]STATISTICS - John Uebersax
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Interquartile Range (IQR) IQR = Q3 - Q1. Ex The sample of books: Q1 = 5, Q3 = 9, IQR = 9 - 5 = 4 … to be continued. 6. Homework. Read pp. 104-117. Make an Excel spreadsheet to compute the mean, median, range, Q1, Q3, and IQR. Name the spreadsheet Mystats. Make it look like this. Data are placed in Column A. Use these formulas:
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[DOC File]Averages using Excel - NRICH
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Averages, quartiles and spread using Excel. Mean. You can use =average(highlight from the first cell to the last cell) or use =average(first cell number:last cell number) to give the mean of a set of numbers.You need to press = before you write average, because it is a formula (or rule).
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[DOC File]2
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The interquartile range (IQR) is just the difference between the first and third quartile. Formulas for first and third quartile. Different sources compute the quartiles slightly differently. Excel computes the first quartile as observations number (n +3)/4 in the sorted list of n observations, while your text uses observation number (n+1)/4.
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[DOCX File]University at Albany - State University of New York
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Excel Commands: When you start a cell with =, excel expects a formula. To compute functions of data stored in column A from 1 to 30: Excel . fomula. min =min(A1:A30) Q1 =percentile(A1:A30,1/4) median ... “ 1.5 IQR away from the box” ...
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[DOC File]Sample Test Questions -- Test 1 - University of Florida
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B. Range= max- min. And here, the first quartile is bigger than the min, so the IQR = Q3-Q1 is smaller than the range. A. For example, N~(2, 20) is also a normal distribution. The mean can be positive, negative or zero. D. Because the variance involves squaring the deviations, it does not have the same unit of measurement as the original ...
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[DOCX File]SLCC Mathematics Site
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Lower fence = Q. 1 – 1.5(IQR)Upper fence = Q 3 + 1.5(IQR)Remember that IQR is the difference between Q. 3 and Q 1, and is the range of the middle 50% of the data. Any data value falling below the lower fence or above the upper fence would be considered an …
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[DOC File]1
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IQR =Q3 - Q1, the distance between the quartiles. The IQR gives the spread in data values covered by the middle half of the data. The quartiles in IQR give a good measure of spread because they are not sensitive to a few extreme observations in the tails.
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[DOC File]Page
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However, by setting up a column of f * x and a column of f*x2 , the mean and standard deviation can be calculated from the formula: . The Excel sample spread sheet shown below illustrates such a calculation for the following frequency distribution. x f 5 3 6 13 7 23 8 …
excel interquartile range formula

[DOC File]Wednesday, August 11 (131 minutes)
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Making a “histogram” with observation number on the x axis and value of the variable on the y axis. Very common mistake when using Excel. HW #14: page 43 (51, 53, 55, 59–62) Thursday, September 4: 1.3 Describing Quantitative Data with Numbers. Read 48–50 Distribute formula sheets. What is the difference between and ?
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Excel iqr formula