How to calculate first and third quartile

    • [DOCX File]Algebra 1 – College

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      To find the first quartile, we calculate the locator, L = 0.25(36) = 9. Since this is a whole number, we know Q1 is the mean of the 9th and 10th data values, $250 and $260. Q1 = $255. To find the third quartile, we calculate the locator, L = 0.75(36) = 27.

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    • [DOC File]Section 1 .edu

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      Step 1 Make a table as shown. Step 2 Find the midpoints of each class and enter them in column C. Step 3 For each class, multiply the frequency by the midpoint, as shown, and place the product in column D. 1.8 = 8, 2. 13 = 26 etc.

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    • [DOC File]Describing Data

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      Calculate the following values: Exercise 5. Sample Mean = Exercise 6. Sample standard deviatons = sx = Exercise 7. Sample size = n = Calculations. Use the table in section 2.11.13 to calculate the following values: Exercise 8. Median = Exercise 9. Mode = Exercise 10. First quartile = Exercise 11. Second quartile = median = 50th percentile ...

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    • [DOC File]Measures of Central Tendency, or more simply measures of ...

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      The first quartile is located 0.67 standard deviation below the mean, and the third quartile is located 0.67 standard deviation above the mean. In other words, we have the following formulas. and ( Example L. The scores on a marketing exam were normally distributed with …

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    • [DOCX File]Microsoft Word - Investigation 1b

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      Calculate the mean, median, mode, range, and standard deviation for your data. Determine the first quartile and the third quartile. Calculate the IQR. Use the . 1.5×IQR . rule to find the upper and lower fences. Use the fences to determine if there are any outliers.

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    • [DOC File]3 - Faculty Websites

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      To calculate the first and third quartiles Arrange the observations in increasing order and locate the median in the ordered list of observations. The first quartile is the median of the observations whose position in the ordered list is to the left of the location of the overall median.

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    • [DOC File]2 - Faculty Websites

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      Find the first quartile, the third quartile, and calculate the distance between (Q3 – Q1). Width of the middle 50% of the data. ... Q1 = first quartile = median of the bottom half of the data. Median . Q3 = third quartile = median of the top half of the data. Maximum . Step 1: Make the box, using Q1, the median, and Q3.

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    • [DOC File]PROBABILITY TOPICS: PRACTICE

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      first quartile = b. median = c. third quartile = d. maximum = e. Suppose we have a sample where all quartiles are actual observations, so that there are k observations between minimum and first ...

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    • Quartile calculator - Calculate Q1, Q2, Q3 and IQR

      First Quartile = Q1 = median of observations that fall below the median. Third Quartile = Q3 = median of observations that fall above the median. Notes When the number of observations is odd, the middle observation is the median. This observation is not included …

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