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Albert Bandura has conducted a number of studies on aggression in children.In one study (Bandura, Ross, & Ross, 1963), one group of nursery school children were shown a film of adults punching, hitting (with a hammer), kicking, and throwing a large rubber Bobo doll. Another group was not shown the film. Afterward, both groups were allowed to play with Bobo dolls in a playroom, and the number of violent contacts were measured in each child. Let us imagine that we replicated this study and obtained the following data (scores are the number of violent contacts with the Bobo doll):
(a) State formally the hypotheses necessary to conduct a directional test of no difference between the two population means.
(b) Complete the test at the .01 level of significance, and state your conclusion.
(c) Compute the estimated effect size, g, and r.
The U.S. government published information on the number of hate crimes involving vandalism and the number of hate crimes against persons
Draw a scatter diagram. Based on the scatter diagram, does there appear to be any relationship between the number assemblers and production? Explain.
Find the margin of error at a 95% confidence level. Give answer to two decimal points.
Fish sizes. Table 28.8 contains data on the size of perch caught in a lake in Finland.10 Use statistical software to help you analyze these data
the number of people arriving for treatment at an emergency room can be modeled by poisson process with rate parameter
A researcher is trying to discover the average age at death for people in the United States today. To obtain data, the obituary columns of The New York Timesare read for 30 days, and the ages at death of people in the United States are noted.
how long does it take to double an investment of 1000 deposited in an account paying 6 annually compounded
One group of 9 mice was compared to another group of 6 mice, using a two-tailed test at a p level of 0.01. The test statistic was calculated as 3.02.
In a population of 5000 students, a simple random sample of 50 students is selected in order to estimate the weighted average mark for the population.
Suppose that the mean weight for men 18 to 24 years old is 170 pounds, and the standard deviation is 20 pounds. In each part, find the value of the standardized score (z-score) for 200 pounds , 140 pounds, 170 pounds and 230 pounds.
Name three elements of the inferential statistical analysis.
Winning has a payoff of 1 while losing has a value of -1. No gain results in a turnover. What is the value of having the ball?
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