BE401 Bioinstrumentation, Fall 2017 Homework #2-Biostatistics Name Hall, Luethe,

Question

BE401 Bioinstrumentation, Fall 2017 Homework #2-Biostatistics Name Hall, Luethe, Pelszynski, and Ringhofer worked with a company that cuts paper from large rolls purchased in bulk from several suppliers. The company was interested in determining the amount of waste (by weight) on rolls obtained from the various sources. Following table gives percent waste data, which the students obtained for six and eight rolls, respectively, of paper purchased from two different sources. Table- Percent Waste by Weight on Bulk Paper Rolls Supplier 1 0.37, 0.52, 0.65 0.89, 0.99, 1.45, 1.47 0.92, 2.89, 3.62 1.58, 2.27, 2.63,6.54 Supplier 2 Estimate (a) means, (b) standard deviations, and (c) standard deviations of mean for the two data sets. Note: you must show all of your work clearly, You may use the Microsoft Excel for this homework. If you use the Excel, you have to submit your Excel file to instructor via email, in order to demonstrate your ability to use the functions. Any other file formats will not be accepted. Bonus Points (10pts): Find (d) medians (Q/0.5)), (e) first (or lower) quartiles (Q(0.25)). () third or upper) quartiles (Q/0.75)), and (g) ranges for the given two data sets.

Explanation / Answer

from excel --data---data analysis ---descriptive statistics: choose data --click ok

below is the output

supplier 1 Mean 1.495 Standard Error 0.569285 Median 0.785 Mode Standard Deviation 1.394457 Sample Variance 1.94451 Kurtosis -1.19547 Skewness 1.014141 Range 3.25 Minimum 0.37 Maximum 3.62 Sum 8.97 Count 6 Largest(1) 3.62 Smallest(1) 0.37 Confidence Level(95.0%) 1.463393 quartile 1 0.5525 quartile 3 2.3975

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