Problem 2: (14 points total) Can pleasant smells improve learning? Researchers p

Question

Problem 2: (14 points total) Can pleasant smells improve learning? Researchers performed an experiment in which 42 subjects were randomly assigned to one of two comparison groups. Subjects assigned to the "treatment" group completed a paper-and-pencil maze with the presence of a floral aroma. Subjects assigned to the control group completed a paper-and-pencil maze without the presence of the floral aroma. All subjects were timed as to how long it took them to complete the maze (in seconds). The data are given in the aroma.csv data set on Canvas. Use these data to determine if there is evidence that the floral scent improved the subjects' ability to complete the maze? (That is, is the average time to complete the maze faster in the presence of the floral aroma than without?) Answer these questions to answer the question of interest. (Note:R tutorial 6 may be helpful in answerin some of these questions.) 1. What is the response variable? Is it quantitative or categorical? (1 point)

Explanation / Answer

1. The response variable is the focus of a question in a study or experiment. An explanatory variable is one that explains changes in that variable. It can be anything that might affect the response variable.

The independent (or explanatory) variable is something that the experimenter purposely changes or varies over the course of the investigation. The dependent (or responding) variable is the one that is observed and likely changes in response to the independent variable.

Hence here response variable is average time to complete the maze and time is quantitative variable.

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