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Which_stats_test

Which_stats_test - Which Statistical Procedure is...

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Which Statistical Procedure is Appropriate? Variables Major assumptions Test SPSS procedure Example research question Comments Tests that ask whether a single variable is distributed as hypothesized One categorical variable with 2 levels None Binomial test Nonparametric tests Binomial Are 50% of all students are female? Determines if each category occurs as often as expected One categorical variable None "One-way" chi-square Nonparametric tests Chi-square Are all eye colors are equally common? Determines if each category occurs as often as expected One numerical variable None Kolmogorov- Smirnov test Nonparametric tests 1-Sample K-S Do IQ scores have a normal distribution? Overly sensitive to sample size; normal probability plot is preferable One numerical variable None Normal probability plot Graph Q-Q Do IQ scores have a normal distribution? Plot will approximate a straight line if distribution is normal One numerical variable Variable is normally distributed One-sample t-test Compare Means One-Sample T Test Do IQ scores have a mean of 100? Determines if population mean is equal to a "test value" specified a priori Tests that ask whether two variables are related Two categorical variables At least 80% of the "expected values" are 5 or more "Two-way" chi-square Descriptive Statistics Crosstabs Are eye color and hair color related?
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