Independent Variable/Dependent Variable Practice
R. Albiani
Two groups of rats are run on a maze. The time that it takes for each rat to reach the goal box is recorded. One group of rats is deprived of food for 24 hours before being run on the maze. The other group is fed 1 hour before the maze trials. All other conditions for the two groups are the same. It was found that the rats, which were deprived of food for 24 hours before each trial, ran the maze at a faster rate than those fed 1 hour before maze trials.
1. The hypothesis is If…Then…
a. Running through the maze … more deprived of food
b. Time of day is the factor … speed will be influenced
c. Deprived of food … run faster
d. Well-fed … will eat more
e. Trials are restricted … time will not be a factor
2. The independent variable is the
a. Food deprivation
b. Morning is evening hours
c. Contented rats
d. Quality of the food
e. Running ability of the rats
3. The dependent variable is the
a. Food that is consumed
b. Time for each rat to run the maze
c. Food deprivation
d. Jumping ability of the rats
e. Quality of the food
4. The control group is the
a. Rats deprived of food for 24 hours
b. Same conditions for both groups
c. Rats who died before the experiment began
d. Rats who were fed 1 hour before running the maze
e. 1 hour rats vs. the 24 hour rats
5. The experimental group is the
a. Rats deprived of food for 24 hours
b. Same conditions for both groups
c. Rats who died before the experiment began
d. Rats who were fed 1 hour before running the maze
e. 1 hour rats vs. the 24 hour rats
Bob just had his car tuned, but was still dissatisfied with his gas mileage. He decided to try a different gasoline and assess his gas mileage. For two weeks he purchased his present gasoline—Cheap-O and noted the miles per gallon that he received. For the following two weeks, Bob purchased a better brand of gasoline—Shell, and noted the miles per gallon that he received. Bob determined that he received better gas mileage with Shell gasoline. In the long-run, it was actually more economical for Bob to buy the slightly higher priced gas (Shell) because he received considerably better miles per gallon with Shell than with the lower priced gas (Cheap-O).
1. The hypothesis is If … then …
a. Buy Shell gasoline … better engine
b. Buy Cheap-O gasoline … better gas mileage
c. Tune car … need to use Shell gasoline
d. Use Cheap-O gasoline … buy new car
e. Use Shell gasoline … more miles per gallon
2. The independent variable is the
a. Cheap-O gasoline
b. Shell gasoline
c. Texaco gasoline
d. Tune up
e. Bob’s car’s gas mileage
3. The dependent variable is the
a. More money to pay
b. Use Cheap-O more often
c. Worse gas mileage
d. Bob goes broke
e. Better gas mileage
4. The control group is the
a. Tune up
b. John’s car
c. Better gas mileage
d. Use of Cheap-O gasoline
e. Use of Shell gasoline
5. The experimental group is the
a. Use of Shell gasoline
b. Use of Cheap-O gasoline
c. Car with no tune up
d. Car without gasoline
e. Bob’s friend’s car