Examlex
The population mean of a standardized test on Cheerfulness is 50. An attitude coach who conducts self-improvement workshops administered the test to a sample of his participants. The obtained sample mean was 55. Since the obtained sample mean was 5 points higher than the population mean can we, therefore, conclude that the workshop was effective? Why or why not?
Trends
Patterns or directions identified over periods of time in data sets or within a series of data points.
Multiple Regression
A statistical technique that models the relationship between a dependent variable and multiple independent variables to understand the impact of each on the dependent variable.
Predict the Value
The process of using information from existing data or a statistical model to estimate or forecast the value of an unknown variable.
ANOVA
Analysis of Variance, a statistical method used to compare the means of three or more samples to see if at least one is significantly different from the others.
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