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Two-Sample Tests What is a two-sample test? A two-sample test is used to compare the means (μ1 & μ2) of two normally distributed populations You use a t-test when the population variances are u...
One-Sample z-tests What is a one-sample z-test? A one-sample z-test is used to test the mean (μ) of a normally distributed population You use a z-test when the population variance (σ²) is known Wha...
Chi-Squared GOF: Uniform What is a chi-squared goodness of fit test for a given distribution? What are the steps for a chi-squared goodness of fit test for a given distribution? Worked Example Chi-...
Chi-Squared Test for Independence What is a chi-squared test for independence? You will use a contingency table This is a two-way table that shows the observed frequencies for the different combina...
Language of Hypothesis Testing What is a hypothesis test? A hypothesis test uses a sample of data in an experiment to test a statement made about the population The statement is either about a popu...
Calculating Poisson Probabilities How do I calculate P(X = x): the probability of a single value for a Poisson distribution? You should have a GDC that can calculate Poisson probabilities You want ...
Properties of Poisson Distribution What is a Poisson distribution? A Poisson distribution is a discrete probability distribution You will be expected to use the distribution function on your GDC to...
Confidence Interval for μ What is a confidence interval? It is impossible to find the exact value of the population mean when taking a sample The mean of a sample is called a point estimate The bes...
Combinations of Normal Variables What is a linear combination of normal random variables? This can be used to find probabilities when combining normal random variables What is meant by the sample m...
