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    So definitely trigonometry and trial & improvement.......
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    I found this, hope it help
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    (Original post by Perfection Ace)
    So definitely trigonometry and trial & improvement.......
    Mean of table, histograms, stratified sampling, hard volume/area questions, sine and cosine rules, compound interest, reverse percentages, F.P or C.F, nth term mathematically similar shapes.
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    (Original post by Tasnia'x)
    I found this, hope it help
    (Original post by junayd1998)
    Mean of table, histograms, stratified sampling, hard volume/area questions, sine and cosine rules, compound interest, reverse percentages, F.P or C.F, nth term mathematically similar shapes.
    Thankssss!!
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    (Original post by Perfection Ace)
    Thankssss!!
    Your welcome, Best of luck!
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    revised too much trig todayfnally got my head round sine n cosine rule...-sigh
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    Definition of stratified sampling?
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    (Original post by ameenatariq)
    Definition of stratified sampling?
    Random sampling - where everyone within the population has an equal chance of being picked.

    Startified sampling - Stratified sampling is a probability sampling technique wherein the researcher divides the entire population into different subgroups or strata, then randomly selects the final subjects proportionally from the different strata.

    Learn both they have come in a maths gcse calc before, also you need to know a method for random sampling.
 
 
 
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