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Dependent and independent variable..PLEASE HELP ME!!!?

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Dependent and independent variable..PLEASE HELP ME!!!?

Postby hutton » Fri May 17, 2013 1:36 pm

What are the dependent and independent variables for these questions?:
a. A study is done to determine if elderly drivers are involved in more motor vehicle fatalities than all other drivers. The number of fatalities per 100,000 drivers is compared to the age of drivers.
b. A study is done to determine if the weekly grocery bill changes based on the number of family members.
c. Insurance companies base life insurance premiums partially on the age of the applicant.
d. Utility bills vary according to power consumption.
e. A study is done to determine if a higher education reduces the crime rate in a population
hutton
 
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Dependent and independent variable..PLEASE HELP ME!!!?

Postby birkee22 » Fri May 17, 2013 1:38 pm

The independent variable is the one that's being used to predict the dependent variable.

a. You're trying to predict the number of fatalities per 100,000 drivers, and you're using the age of the driver to make the prediction.
Age of driver is the independent variable and number of fatalities is the dependent variable.

b. You're trying to predict the weekly grocery bill, and you're using the number of family members to make your prediction.
Number of family members is the independent variable and grocery bill amount is the dependent variable.

c. Insurance companies are trying to predict the cost of insuring a person (life insurance premium) and they're using the age of the applicant to make the prediction.
Age of applicant is the independent variable and insurance premium is the dependent variable.

d. You're trying to predict the utility bill, and you're using power consumption to predict it.

e. You're trying to predict the crime rate in a population and you're using education level to predict it.
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