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Sampling Distributions (Z scores / Normal Distribution) (Means (n >= 30…
Sampling Distributions (Z scores / Normal Distribution)
The collection of all possible values in all possible samples of the same size from
the same population.
Proportions
we need at least 10 successes and 10 failures
random
independent
not larger than 10% of the population.
Z test
Means
n >= 30
Random
Independent
< 10% of the population
Population SD (σ) known?
Z test
T test
n < 30
outliers and skewness
Population normally distributed?
.
Standard error – Standard Deviation of the Sample Help -> Sample Data -> Teaching Scripts -> Interactive Teaching Modules
Standard error – Standard Deviation of the Sample
