# 4 mm whereas the setosa irises are the shortest with

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It appears that the petal length of Virginica irises are the longest with the range of 2.4 mm, whereas the Setosa irises are the shortest with the range of 0.9 mm. We can also see that they are the longest and shortest through their means of 5.552 and 1.464. As to referring to the boxplot, the Setosa irises have smaller values since it appears more towards the left side of the graph than both the Versicolor and Viriginica irises, as the Virginica has larger values since it appears more towards the right of the graph. The sepal lengths of all three classes of Irises vary by similar amounts. We can see this in the coefficients of variation, which are all between about 10% to 12%, or by the bar charts, all three of which have a similar spread. Flesch-Kincaid Grade Level Scores Introduction The research done was conducted from 12 pages randomly selected from each of three books that were written by different authors. The books are The Bear and the Dragon by Tom Clancy, Harry Potter and the Sorcerer’s Stone by J. K. Rowling, and War and Peace by Leo Tolstoy. The data set lists the mean number of words per sentence, the mean number of characters per word, the Flesch Reading Ease score, and the Flesch-Kincaid Grade Level score. Azusa Pacific University Page 2 of 6
MATH 130 – Introduction to Statistics Lab Report 2 Spring 2018 Statistics for Describing, Exploring, and Comparing Data The purpose of our computations is to compare the books written by the three different authors based on the Flesch-Kincaid Grade Levels. Report Flesch-Kincaid Grade Level Author N Me an Varian ce Std. Deviation Medi an Ran ge Minim um Maxim um Clancy 1 2 6.5 00 5.995 2.4484 5.750 8.8 3.2 12.0 Rowlin g 1 2 5.0 75 1.364 1.1678 5.050 3.7 3.2 6.9 Tolstoy 1 2 8.4 33 4.033 2.0083 8.300 5.6 5.9 11.5 Total 3 6 6.6 69 5.528 2.3513 6.100 8.8 3.2 12.0 The mean of the Flesch-Kincaid Grade Level score of Rowling’s book is 5.075, whereas the standard deviation of Rowling’s book is 1.1678 Using the Range Rule of Thumb, the values less than 2.7394 and more than 7.4106 are significant. These values were calculated by using the formulas mean + ¿ −( 2 standard deviation ) .