Homework 4

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For each of the following ten educated guesses, or research ideas: A) state the populations; B) state the null hypothesis; C) state a directional research hypothesis; D) state a nondirectional research hypothesis

1. A sample of rats in a laboratory is given an experimental drug intended to make them learn a maze faster than other rats.
2. Do French children whose parents are engineers score higher than French children in general on math ability?
3. Do people who experienced the 1994 Northridge earthquake have more or less self-confidence that the general population?
4. A researcher wants to discover whether children’s diets affect adult intelligence. Twenty years later, he gives an IQ test to children who ate a low-fat, low-carbohydrate diet and compared them with children who ate a low-fat, high-carbohydrate diet.
5. Dr. Wilson wants to find out whether men or women are better drivers. She sets up an obstacle course and records the number of errors made by the drivers.
6. Harriet has a hypothesis that higher grades are achieved by students who sit at the front of the classroom. With the help of her colleagues, she gathers information about seating arrangements and classroom grades.
7. Jenny and Sarah are having an argument. Jenny thinks that single people are more likely to own pets, for companionship. Sarah thinks that pets are more likely to be adopted into a family because “pets and kids go together.”
8. Researchers have consistently found that people who have a “Type A” personality are more likely to suffer heart attacks than people who have a “Type B” personality.
9. Is the level of income for residents of North Hollywood higher than the level of income of the residence in the San Fernando Valley?
10. Do drivers delay their departure from a Parking spot if they notice that some other driver is waiting to take that parking spot?