The Indiana State Police union is interested in whether the number of miles driven by each...
The Indiana State Police union is interested in whether the number of miles driven by each trooper is the same or different for the three different 8-hour shifts. Twenty Indiana state troopers were selected randomly selected on each of the three shifts and the number of miles that they traveled was recorded.
a) Is this an observational or an experimental study? Please explain your answer.
b) What is the population in this study?
All Indiana State Troopers
c) What is the factor or treatment in this study?
The Indiana State Police union
The recorded number of miles
All Indiana State Troopers
20 Indiana troopers in each shift.
The times of the shift.
All police officers
The times of the shift.
The Indiana State Police union
20 Indiana troopers in each shift.
The recorded number of miles
All police officers
d) What is the outcome variable of this study?
All Indiana State Troopers
The Indiana State Police union
20 Indiana troopers in each shift.
The recorded number of miles
All police officers
The times of the shift.
e) State a possible source of bias in this study. Feel free to speculate beyond the explicit statement of the question. However, nothing that is assumed can be contradicted by what is stated. Please include any assumptions that you are making.
Homework Answers
a.
It is an experimental study. Because Indiana state police provide different treatment (different times of the shift) to 3 groups of 20 troopers.
b.
All Indiana State Troopers
c.
The times of the shift.
d.
The recorded number of miles
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The Indiana State Police union is interested in whether the
number of miles driven by each...
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