Frequency graphs
I've worked out that the mean is 1.55. And the standard deviation is 2.2075.
On my current table, I have the columns x, midpoint(x), frequency, x^2f, fx. If I want to create a cumulative frequency graph, would I need to add in the cumulative frequency column? If so would I use the cumulative frequency as one axis, and midpoint(x) or (x) as the other axis?
http://imgur.com/MRgRjQJ
On my current table, I have the columns x, midpoint(x), frequency, x^2f, fx. If I want to create a cumulative frequency graph, would I need to add in the cumulative frequency column? If so would I use the cumulative frequency as one axis, and midpoint(x) or (x) as the other axis?
http://imgur.com/MRgRjQJ
(edited 10 years ago)
Original post by theonn
I've worked out that the mean is 1.55. And the standard deviation is 2.2075.
On my current table, I have the columns x, midpoint(x), frequency, x^2f, fx. If I want to create a cumulative frequency graph, would I need to add in the cumulative frequency column? If so would I use the cumulative frequency as one axis, and midpoint(x) or (x) as the other axis?
http://imgur.com/MRgRjQJ
On my current table, I have the columns x, midpoint(x), frequency, x^2f, fx. If I want to create a cumulative frequency graph, would I need to add in the cumulative frequency column? If so would I use the cumulative frequency as one axis, and midpoint(x) or (x) as the other axis?
http://imgur.com/MRgRjQJ
x would be one axis, and cumulative frequence the other, BUT the cumulative frequency would correspond to the upper class limit of each class.
So, in your example, a cumulative frequency of 49 would have an x-coordinate of 1.
(edited 10 years ago)
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