Topic: sigma list of topics
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	Sigma notation		2019-12-04
		From Kenneth: What would be used for the top and bottom indices for the sigma sign in my example shown below? If the amounts were 1 + 2 + 3, the top index would be 3 and the bottom would be i = 1, but if the amounts are 1 + 2 + 4, or 1 + 0.05 + 1/3, what would the indices be since these amounts are in an uneven pattern. I thank you for your reply and explanation Answered by Harley Weston.
	2+6+12+20+30+42		2009-04-24
		From fredy: what is the sigma notation for the series 2+6+12+20+30+42? Answered by Stephen La Rocque.
	Sigma notation		2008-01-06
		From jamelia: what is this word problem in sigma style i am so lost at this point my first time ever attempting this subject 1+2+3+4+5 Answered by Penny Nom.
	Standard Deviation		2007-06-13
		From Adrian: If you are told that the mean salary of a certain group of workers is $30,000 with a standard deviation of $4000, what proportion of workers earn over $38,000? What proportion of workers earn less than $18,000? Assume the distribution of wages is normal. Answered by Stephen La Rocque.
	Sigma notation		2006-12-05
		From Marie: how do i get this in sigma notation...i only need an explanation 1^2 + (2+3)^2 + (4+5+6)^2 + (7+8+9+10)^2.... Answered by Penny Nom.
	Sigma		2001-03-31
		From A student: What does the Sigma symbol mean in mathematics? Answered by Penny Nom.

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