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Quiz

Probably distributions

Vicky Cartwright 8 perguntas

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Perguntas do quiz (8)

  1. 1A descriptive (categorical) random variable is a variable which....
    1. AIs usually a word/label e.g. colour, shape...
    2. BDescribes something
    3. CIs usually a whole number
    4. DValues are measured
  2. 2A discrete random variable is a variable which....
    1. AValues are whole numbers
    2. BCounting is involved
    3. CIt's possible to calculate a value for P(X=x)
    4. DValues are measured and not counted e.g. student's height
    5. EYou can't know the exact probability of something, only the probability of an interval
    6. FMight look like a binomial or Piossion distribution
    7. GMight not have a recognised pattern, but can be defined by an equation, graph or table
    8. HPossible distributions are: normal, rectangular (continuous uniform) & triangular
  3. 3A contiuous random variable is a variable in which....
    1. AValues are measured, not counted
    2. BP(X=x) = 0 for any value of x e.g. you can't be exactly 1.6m tall, but you can find the probability that x lies within an interval P(x1 < X < x2) i.e. you can find the probability that your height is between 1.60-1.61m
    3. CValues are whole numbers
    4. DPossible distributions: normal, rectangular, triangular
    5. Eit's possible to calculate the value for P(X=x)
    6. FPossible distributions: binomial & Poisson
  4. 4The number of glow worms per m2 is a discrete variable
    1. AVerdadeiro
    2. BFalso
  5. 5Distance between two cities is a descriptive variable?
    1. AVerdadeiro
    2. BFalso
  6. 6Adult clothing size (S/M/L) is a continuous variable
    1. AVerdadeiro
    2. BFalso
  7. 7When describing a discrete [blank_start]random variable[blank_end] you need to state the [blank_start]highest[blank_end] and [blank_start]lowest[blank_end] values, the [blank_start]mode[blank_end] and describe the [blank_start]shape[blank_end].
    1. Ahighest
    2. Blowest
    3. Cmode
    4. Dshape
    5. Edistribution
  8. 8Describe the following distribution: Imagem da pergunta 8
    1. AMode
    2. BSkewed left (slightly)
    3. CLowest value
    4. Dhighest value

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Descrição
Quiz sobre Probably distributions , criado por Vicky Cartwright em 20-08-2017.
Idioma
English
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1
Etiquetas
level 3
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