How to find the first quartile stats
[DOC File]Z-Score Practice Worksheet
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a) between the minimum and the first quartile. b) between the first quartile and the median . c) between the median and the third quartile. d) between the third quartile and the maximum. e) at the mean score for all students . 7. Multiple Choice. Scores on the ACT college entrance exam follow a Normal distribution with a mean 18 and a standard ...
[DOC File]ST 241 - Introduction to Business Statistics
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Quartile is just a special type of percentile: the first quartile is the 25th percentile. The second quartile is the 50th percentile (also the median). The third quartile is the 75th percentile. Find the first quartile: 11*25/100 = 2.75 We need the number .75 of the way between 6 and 6 = 6.
[DOC File]DESCRIPTIVE STATISTICS
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Procedure: Sort data from lower to high. Calculate Q1(1st. quartile), Q2 (2nd. quartile), Q3 (3rd. quartile) and build a box with ends located at Q1 and Q3. A vertical line through the box is placed at the median (Q2). Limits are set up at each side, by calculating the interquartile range (IQR = Q3-Q1) and multiplying it by 1.5 times.
[DOC File]STATISTICS IS THE STUDY OF DATA - De Anza College
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"Special" Percentiles: First Quartile Q1 Median (Med) Third Quartile Q3. Your calculator can find these special percentiles using 1-variable statistics. c. The third quartile is 17.5. Write a sentence that interprets the third quartile in the context of this problem.
[DOC File]The Standard Deviation as a Ruler
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The Standard Deviation as a Ruler. 1. Here are the summary statistics for the weekly payroll of a small company: lowest salary = $300, mean salary = $700, median = $500, range = $1200, IQR = $600, first quartile = $350, standard deviation = $400.
[DOC File]Mean, Median, Box & Whisker Plots
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(Lower Quartile or Quartile 1) Find the Median of the upper set of numbers. (Upper Quartile or Quartile 3) Find the Smallest number. (Lower Extreme) Find the Largest number. (Upper Extreme) Plot all of the above points on the number line. Draw a box around the Lower and Upper Quartiles and Whiskers out to …
[DOC File]The Practice of Statistics - AP STATISTICS - AP Statistics
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What is the median of a distribution? Explain how to find it. Explain why the median is a resistant measure of center? How does the shape of the distribution affect the mean and median? What is the range? Is the range a resistant measure of spread? Explain. How do you find first quartile Q1 and third quartile Q3? What is the Interquartile Range ...
STATISTICS: Sect
(1) First, make sure numbers are in increasing order. (2) Locate the median (or solve for the median) (3) To find Q1 (first quartile): Find the median of ALL values that are below the median.
[DOC File]The Practice of Statistics
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How do you find first quartile Q1 and third quartile Q3 by hand . and. find on the calculator. Describe Spread and Outliers (continued) What is the Interquartile Range (IQR)? Is the IQR and the quartiles a resistant measure of spread? Explain. How is the IQR used to identify outliers? What is the five-number summary of a distribution?
[DOC File]Sample Test Questions -- Test 1 - University of Florida
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A. Standardize first, and we can get –1.7 < x < -0.2. Then, look at the table, the total area should be .4207 – .0446= .3761. D. We want to find the score x with area 0.03 to its right under the normal curve. That’s the same as finding the score x with area 0.97 to its left. Use the table A …
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