In a student group, a record was kept of the number of days absence each student had
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In a student group, a record was kept of the number of days absence each student had over one particular term. The results are shown in the table. Number days Number of absent (x) fx students f 0 12: 1 20 2 10 3 7 4 5 fx a Complete the table. b Calculate the variance for these data. c Work out the standard deviation for these data.
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Related Book For 
Edexcel As And A Level Modular Mathematics Statistics 1
ISBN: 978-0435519124
1st Edition
Authors: Keith Pledger Et Al
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