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Suppose an educational psychologist is carrying out an experiment in which grade school children hear one of four stories: (1) a stereotypical (and sexist) story in which a boy is the active hero while a girl just passively watches him, (2) a reverse stereotype story in which a girl is active while a boy just watches, (3) a story in which both a boy and a girl are active, or (4) a story in which both a boy and a girl are passive. Of the children who hear a given story, 15 are boys and 15 girls. After hearing the story (whichever of the four kinds it is), each subject is given an opportunity to work at the mildly frustrating task of using long-handled spoons to rearrange a terrarium in a narrow necked jar. The psychologist observes how long the subject persists at the task. This experiment has which kind of design?
(a) A one-way design in which type of story is the treatment variable.
(b) A one-way design in which sex of subject is the treatment variable.
(c) A two-way design in which type of story and sex of subject are the treatment variables.
(d) A two-way design in which type of story and persistence at the task are the treatment variables. Explain.
Suppose the distribution of ages of cars on U.S. roads is approximately bellshaped. If 99.7% of the ages are between 1 year and 14 years.
The "feathered-flightless" stage has mean weight 864 grams and standard deviation 100 grams. Find the proportion of male mallards at this stage that weigh less
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In comparing two variances below, determine test value and what are degrees of freedom that must be used?
It will take 30 minutes regardless of the traffic conditions. Lynn's utility for travel time is: U(15 minutes) = 0.9, U(30 minutes) = 0.7, and U(40 minutes) = 0.2. Which route will minimize Lynn's expected travel time?
give an example of how one might use linear programming in the real
question a political party suspects there are differences in presidential candidate preferences based on age. a
The William Graham Entertainment Company will be opening a new box office where customers can come to make ticket purchases in advance for the many entertainment events being held in the area. Simulation is being used to analyze whether to have on..
If you know the mean and standard deviation of a normally distributed population, and somebody asks you questions about the highest 1% and lowest 1% of numbers.
1.a study was conducted to explore the relation between alcohol consumption and hypertension. 7400 nurses were surveyed
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For a sample of students in the college of business administration at mid-atlantic university, the mean grade point average is 3.10 with a standard deviation of 0.25.
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