PPT-Quartiles

What are they What is a Quartile There are 3 types of Quartiles The Quartile The Upper Quartile The Lower Quartile A Quartile is the median of an ordered data set The Upper Quartile. . Whiteboardmaths.com. © 2004 - 2008 All rights reserved. Stand SW 100. In addition to the demos/free presentations in this area there are at least 8 complete (and . FREE. ) presentations waiting for download under the . Measures of location in comparison to the mean.. - standard scores. - percentiles. - deciles. - quartiles. Z score or Standard Score. 90 on a music test vs 45 on an English test. The Z score tells us how many standard deviations a data value is above or below the mean. . Measuring how . much . the . group as a whole deviates from . the center.. Gives you an indication of what is the spread of the data.. The common measures of variation in data are – . range. , . deviation. STA 200 . Summer I . 2011. Measures of Center and Spread. Measures of Center:. median. mean. Measures of Spread:. quartiles & five number summary. standard deviation. Median. The median is the midpoint of a distribution.. Investigating leaf size for different trees . How can we collect a random sample of 20 leaves? . What measurement shall we take?. Leaf A length mm. Leaf B length mm. Leaf C Length mm. 54. 78. 46. 65. A diagram that summarizes data by dividing it into four parts.. It compares two sets of data.. Box and Whisker Plots. (UQ) Upper Quartile . Is the median of the upper half of the data. (UE) Upper Extreme-. Study Procedures and Data Elements, Sources, Uses, and Issues . Thomas Delate, PhD, MS. Clinical Pharmacy Research Scientist. Learning Objectives. Class 3: Study Procedures and Data Elements, Sources, Uses, and Issues . Box and Whisker Plots. Quartile: include . Inter-quartile: . -. .  . 78 85 88 88 89 90 92. A . box-and-whisker. . plot. shows the distribution of data. The middle half of the data is represented by a “box” with a vertical line at the median.. Quartiles, Deciles,. Percentiles. Q. 1. , Q. 2. , Q. 3. . divides . ranked. scores into four equal . parts, using three quartiles.. Quartiles. 25%. 25%. 25%. 25%. Q. 3. Q. 2. Q. 1. Q. 1. , Q. 2. It compares two sets of data.. Box and Whisker Plots. (UQ) Upper Quartile . Is the median of the upper half of the data. (UE) Upper Extreme-. . The greatest value . (LQ) Lower Quartile . Is the median of the lower half of the data. Sample – only a part of the whole. Based on sample, we’ll make a prediction about the population.. Bad sampling: convenience, bias, voluntary. Good sampling: simple random sample(SRS).. Inferential Stats: making predictions or. 3, 5, 4, 2, 1, 6, 8, 11, 14, 13, 6, 9, 10, 7. First, order your numbers from least to greatest:. 1, 2, 3, 4, 5, 6, 6, 7, 8, 9, 10, 11, 13, 14. Median. 1, 2, 3, 4, 5, 6, 6, 7, 8, 9, 10, 11, 13, 14. Then find the median (from the ordered list):. • What does the median of a box plot tell us about the rest of the data. • How can you use quartiles to describe the data?. WARM UP. How many times per day do you brush your teeth?. 1. Create a box plot of the following responses.. Phase I Results and Phase II Plans. 8/5/2020. Background. Chlorophyll-. a. data submitted to SWQMIS is currently analyzed using several different laboratory methods. Potential for high degree of variability when assessing the resulting data.