Examlex
A supermarket chain has its own house brand of ice cream. The general manager claims that her ice cream is better than the ice cream sold by a well-known ice cream parlour chain. To test the claim, 40 individuals are randomly selected to participate in the following experiment. Each respondent is given the two brands of ice cream to taste (without any identification) and asked to judge which one is better. Suppose that 25 people judge the ice cream parlour brand better, four say that the brands taste the same, and the rest claim that the supermarket brand is better.
Can we conclude at the 1% significance level that the general managers' claim is false?
Independent Variable
The variable in an experiment that is manipulated to observe its effect on the dependent variable.
Dependent Variable
The variable in an experiment that is affected by manipulation of the independent variable, and is measured or observed by the researcher.
Control Variable
An experimental element which is constant and unchanged throughout the course of the investigation to ensure that the effect of the independent variable can be measured accurately.
Control Group
In experimental research, a group of subjects that is not exposed to the experimental treatment, serving as a comparison point.
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