Probability, Stats distributions and hypothesis tests

Cards (27)

  • Alternate hypothesis
    This tells us about the parameter If your assumption is shown to be wrong H1
  • Conditions for binomial
    Fixed trials Two outcomes Fixed probability Trials are independent
  • Critical regions
    Closest value to significance level. Region where we would reject
  • Independent probability formula
    P(AnB)=P(A) x P(B)
  • Less than significance level
    Reject H0
  • More than significance level
    Accept H0
  • Mutually exclusive
    They both cannot happen at the same time
  • Mutually exclusive how to find P(AuB)
    P(A)+P(B)
  • Mutually exclusive P(AnB)
    Equals 0
  • Null hypothesis
    The hypothesis you assume to be correct H0
  • One tailed mean
    Increase or decreases
  • Test statistic
    Results from the experiment Eg the number of heads obtained
  • Two tailed test
    Change in either direction
  • When to use binomial cd
    When it is less than or equal to
  • When to use binomial pd
    When it is equals P(X=x)
  • P(A')

    Not A
  • P(A'nB)

    Not A and B
  • P(AnB)

    A and B
  • P(A)
    A
  • P(AuB')

    A or not B
  • P(AuB)

    A or B
  • What is a hypothesis test
    A hypothesis test is a statistical test that is used to determine that is used to determine whether there is enough evidence in a sample of data to infer that a certain condition is true for the entire population
  • What is a critical value
    A critical value is the point (or points) on the scale of the test statistic beyond which we reject the null hypothesis.
  • What does pmcc measure
    The product moment correlation coefficient measures the type and strength of linear correlation between two variables.
  • Explanatory variable
    Independent variable
  • Response variable
    Dependant
  • How to calculate pmcc on a calculator
    Menu
    6 statistics
    2 y=ax+b
    Optn
    4 regression calculation