IV DV & correlation worksheet
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Ohio State University *
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2221
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Health Science
Date
Feb 20, 2024
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docx
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For each item below, specify the independent variable (IV) and dependent variable (DV). 1.
A study was done to find if different tire treads affect the braking distance of a car.
IV: tire treads DV: braking distance
2.
The time it takes to run a mile depends on the person’s running speed.
IV: person’s running speed DV: time it takes to run a mile
3.
The height of bean plants depends on the amount of water they receive.
IV: amount of water they receive DV: height of bean plants
4.
The higher the temperature of the air in the oven, the faster a cake will bake.
IV: tire treads DV: braking distance
5.
Lemon trees receiving the most water produced the most lemons.
IV: tire treads DV: braking distance
6.
An investigation found that more bushels of potatoes were produced when the soil was
fertilized more.
IV: tire treads DV: braking distance
7.
Students measured the temperature of the water at different depths in Lake Skywalker and
found that the temperature varied.
8.
The amount of pollution produced by cars was measured for cars using gasoline containing
different amounts of lead.
9.
Four groups of rats are first massed and then fed identical diets except for the amount of
vitamin A they receive. Each group gets a different amount. After 3 weeks on the diet, the rats’
masses are measured again to see if there has been a decrease.
For each item below, specify the independent variable (IV) and dependent variable (DV). 1. A study was conducted on sleep deprivation and cognitive performance on a problem-solving test. One group of subjects was deprived of 1 hour of sleep, the other group of subjects was deprived of 4 hours of sleep. Then they were given the problem-solving test. 2. Developmental psychologists want to know if exposing children to public television improves their reading skills.
3. Cognitive psychologists wonder what kind of charts are easiest for people to remember.
4. A clinical psychologist wants to know whether people who have had psychotherapy are more or less likely to have problems in the future.
5. A social psychologist wants to know whether being polite or rude to people tends to make them more
cooperative.
6. An organizational psychologist test to see if wearing name tags make the employees happier with their work.
7. A personality psychologist explores whether extroverted people have more fun at parties.
Correlations (Positive, negative, and no relationship)
1. The scatter plot shows the population of California from 1997 to 2002. What kind of correlation exists between them?
2. What kind of correlation does the statement describe?
"As the number of workers increases, the number of days required to complete work decreases”
3. For each of the following pairs of variables, indicate whether you would expect a positive or negative correlation? (a) The age of a secondhand car and its price. (b) The weight of a new car and its overall miles-per-gallon rating. (c) The height and the weight of a person. (d) The height of a person and the height of the person’s father. (e) The height and the IQ of a person.
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