Homework Answers
Based on histogram what percentage of data are below 41?
- Percentage of data below 41
= (Count (11-20) + Count (21-30) + Count (31-40) ) / total * 100 %
= (1+4+7) / (1+4+7+3+1) * 100 %
= 0.75 * 100%
= 75%
9)
Sample: 10,25,28,35
Sample mean = (10+25+28+35)/4 = 24.5
using N-1, we get
sample variance = {(10-24.5)^2 + (25-24.5)^2 + (28-24.5)^2 + (35-24.5)^2}/ (4-1)
= 333/3
= 111
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