d) What is the best measure for the center of this distribution, the mean or the median? e) What is the best measure for the spread of this distribution, the range, the standard deviation, or the Inter Quartile Range? f) Is it appropriate to use the Empirical Rule to make approximations of this data set? Explain. skewed right or left, symmetric), and whether or not there are any possible outliers. unimodal, bimodal, uniform), the skew/symmetry (i.e. b) Are the calculations you found for part (a) statistics or parameters? c) Describe the shape of the distribution using correct statistical vocabulary by noting the modality (i.e. What is the mean of this sample data? (round to two decimal places) What is the median of this sample data? What is Q1 and Q3? What is the IQR of this sample data? What is the standard deviation of this sample data? (round to three decimal places).
(To do this enter the data in L1 and then go to STAT-CALC-1 VarStats.) List the data you entered into L1. (15 pts) (5 | O means 50 centimeters) 2 9 3 3 8 4 3 8 9 5 4 6 6 7 7 8 6 0 2 2 5 7 6 7 a) Use the 1 Var Stats command in your TI-83/84 graphing calculator to find the mean, median, IQR and standard deviation. Their findings are given in the stem-and-leaf plot below. Assignment: (39 points total) 1) Students in a biology class kept a record the height (in centimeters) of plants for a class experiment. Then scan your written work, save it as a PDF file, and submit it on Canvas. Many people argue that the interquartile range represents a more effective measurement than the median or mean because it provides insights into how the data is dispersed as opposed to giving a single number.Transcribed image text: Written Homework Assignment for Chapters 2 & 3 MATH-138 Online Statistics Directions: Write out your solutions to the questions below on a separate sheet of paper. For example, how students will typically perform on an exam or the salary levels of a set of employees working in a given industry.
It is frequently calculated as a means of identifying what the range of an average performance should be. The interquartile range (IQR) is the range from the 25 th percentile to the 75 th percentile, or middle 50 percent, of a set of numbers. How to use the Interquartile Range Calculator:ġ) Enter each of the numbers in your set separated by a comma (e.g., 1,9,11,59,77), space (e.g., 1 9 11 59 77) or line break.Ģ) Click on the "Calculate" button to calculate the interquartile range.
You can use this interquartile range calculator to determine the interquartile range of a set of numbers, including the first quartile, third quartile, and median.
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