An experiment was conducted to compare electricity usage (in KWh) for four different residential air-conditioning systems being proposed for use in tract homes. Twenty homes selected for the experiment were grouped into 5 blocks according to floor space, type of insulation, directional orientation and type of roof and exterior with 4 homes in each block. Within each of the blocks the four homes were randomly assigned to the four systems. (i) What is the factor of interest? (ii) What are the experimental units? (iii) What is the response variable? (iv) What is the purpose of blocking the homes on the given variables?
An experiment was conducted to compare electricity usage (in KWh) for four different residential air-conditioning systems being proposed for use in tract homes. Twenty homes selected for the experiment were grouped into 5 blocks according to floor space, type of insulation, directional orientation and type of roof and exterior with 4 homes in each block. Within each of the blocks the four homes were randomly assigned to the four systems.
(i) What is the factor of interest?
(ii) What are the experimental units?
(iii) What is the response variable?
(iv) What is the purpose of blocking the homes on the given variables?
In an experiment, the response variable is a variable of interest for which we have to infer. The factor(s) is(are) those variables who affects the response variable. The entity on which an analyst makes inferences based on the sample is called the experimental units. In this experiments, the information provided that there are 20 homes blocked into 5 blocks.
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