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Originally Posted by Raeesa
1. Frequency Polygons: The point u place in the graph should be the mid point of the interval right?
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Yes, you should plot the frequency at the midpoint of the interval (
BBC - GCSE Bitesize - Maths | Data Handling | Frequency polygons)
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2. Stratified Sampling: If your asked to work out how many people u need from each category for a sample of say 50 ppl and when u do the formula (number of ppl in category/total number)*50 for each category and u have had to round up or down.. n u get perhaps 51 at the end when u count how much.. wat do u do??!! is it ok to leave it like that??!
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Is it possible to post the question here? The rounded total should add up to 50, not 51, as far as I know.