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please help

 
 
Reply Mon 9 May, 2016 05:00 am
A sample of small bottles and their contents has the following weights (in grams): 4, 2, 5, 4, 5, 2 and 6. What is the sample variance of the weight?
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Type: Question • Score: 3 • Views: 779 • Replies: 2
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selectmytutor
 
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Reply Tue 10 May, 2016 04:20 am
@Kavitha7,
2,3,1,1,3,4
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ascribbler
 
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Reply Tue 10 May, 2016 10:59 pm
@Kavitha7,
Calculate the mean (the average weight of the 7 bottles by dividing the total weight of all the bottles by 7).

The variance (σ2), is defined as the sum of the squared distances of each term in the distribution from the mean (μ), divided by the number of terms in the distribution (N).

http://www.cdn.sciencebuddies.org/Files/474/9/DefVarEqn.jpg

http://www.sciencebuddies.org/science-fair-projects/project_data_analysis_variance_std_deviation.shtml
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