# Worksheet 3B.Winter.2020.pdf - Math 146 Online Worksheet#3B...

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Math 146 Online Worksheet #3B Name ____________________________ Measures of Variation and Position Date: ____________Score: ________/64pts Revised April 23, 2019 1. Use the histograms to answer the questions. Questions: a) Construct the frequency table for each class. (2pts) Class Boundaries Frequency for Class 1 (number of students) b) Determine the total number of students in each class. Class 1 has ________ Class 2 has ________. c) Based on the given histograms, which class do you think has the highest mean score? ___________ Explain your answer. d) Which class had the highest median score? __________________ e) Compute the mean score in each class rounded to one decimal place. ( Use the process for computing mean for grouped data or you may use the 1-Var STAT function on your calculator. Go to the module for Test 2 and open the “Section Notes” folder for instructions ). No need of showing your work on this paper. Frequency for Class 2 (number of students) Mean score for class 1: 1 x _______________ Mean score for class 2: 2 x ________________ f) Compute the sample standard deviation for each class rounded to 1 decimal place. No need of showing your work. ( Use the process for computing mean for grouped data or you may use the 1-Var STAT function on your calculator. Go to the module for Test 2 and open the “Section Notes” folder for instructions ). Standard deviation for class 1: 1 s _______________ Standard deviation for class 2: 2 s _______________ 0 1 2 3 4 5 6 7 8
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