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Flashcards

AS Level Maths - S1: Chapter 2

Ben C Maths AS - Level Inglês 21 flashcards

AS Level Maths - S1: Chapter 2

Flashcards do conjunto (21)

  1. 1What is a quantitative variable?A variable that is associated with numerical observations.
  2. 2What is a qualitative variable?A variable that is associated with non-numerical observations.
  3. 3What is a discrete variable?A variable that can take only specific values in a given range.
  4. 4What is a continuous variable?A variable that can take any value in a given range.
  5. 5What is a measure of location?A way a set of data can be summarised by giving a single number to describe its centre.
  6. 6What are the 3 measures of location?Mode, median and mean.
  7. 7How do you work out the median of DISCRETE data?1. Divide the total no. of observations by 2.
    2. If n/2 is a WHOLE number, find the midpoint of the term and the term above.
    3. If n/2 is NOT A WHOLE NUMBER, round the number up and pick the corresponding term.
  8. 8E.G. of the previous flashcard.E.G. of the previous flashcard.
  9. 9How do you work out the mean of DISCRETE data?How do you work out the mean of DISCRETE data?
  10. 10What is the formula for working out the combined mean?What is the formula for working out the combined mean?
  11. 11When should you use the mode?-Used when the data is qualitative.
    -Not very informative if each value occurs only once.
  12. 12When should you use the median?-Used for quantitative data.
    -Usually used when there are extreme values as they do not affect it.
  13. 13When should you use the mean?-Used for quantitative data and uses all the pieces of data.
    -Gives a true measure of the data.
    -Affected by extreme values.
  14. 14How do you find the mean of grouped continuous data?Where x is the mid-point of the class.How do you find the mean of grouped continuous data?
  15. 15How do you find the median of grouped continuous data?-Divide n by 2.
    -Use interpolation to find the value of the corresponding term.
  16. 16What does the line method look like for interpolation?What does the line method look like for interpolation?
  17. 17What is the formula for interpolation?What is the formula for interpolation?
  18. 18What MUST you be careful of when interpolating?Using the CORRECT class boundaries.
    If there is a gap, find the mid-point between the classes.
    If not, use the values of the classes.
  19. 19What is the modal class?The class with the highest frequency.
  20. 20In coding, how do you find the mean of the original data?1. Find mean of coded data.
    2. Equate this to the coding used.
    3. Solve.
  21. 21—

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Descrição
AS - Level Maths (S1) FlashCards sobre AS Level Maths - S1: Chapter 2 , criado por Ben C em 05-03-2016.
Criado por
Ben C · mar 2016
Atualizado
10 nov 2016
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85
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