Identify the parameter of interest to the researchers

Assignment Help Basic Statistics

Reference no: EM131402524

Personality and aggressive behavior. How does personality impact aggressive behavior? A team of university psychologists conducted a review of studies that examined the relationship between personality and aggressive behavior (Psychological Bulletin, Vol. 132, 2006). One variable of interest to the researchers was the difference between the aggressive behavior level of individuals in the study who scored high on a personality test and those who scored low on the test. This variable, standardized to be between -7 and 7, was called ‘‘effect size.''

(A large positive effect size indicates that those who score high on the personality test are more aggressive than those who score low.) The researchers collected the effect sizes for a sample of n = 109 studies published in psychological journals. This data are saved in the PERAGGR file. A dot plot and summary statistics for effect size are shown in the accompanying MINITAB printouts (bottom of p. 40). Of interest to the researchers is the true mean effect size μ for all psychological studies of personality and aggressive behavior.

2232_Figure 3.jpg

(a) Identify the parameter of interest to the researchers.

(b) Examine the dot plot. Does effect size have a normal distribution? Explain why your answer is irrelevant to the subsequent analysis.

(d) If the true mean effect size exceeds 0, then the researchers will conclude that in the population, those who score high on a personality test are more aggressive than those who score low. Can the researchers draw this conclusion? Explain.

Reference no: EM131402524

Questions Cloud

Examine the impact of health policy on nursing management : Examine the impact of health policy on nursing management. Examine the report as an exemplar when discussing governance, and related quality topics in the unit. For Assignment 2, answer the following questions:

Is the asset a long-maturity asset or a shortmaturity asset : Which of the properties of money (medium of exchange, store of value, unit of account) does the asset have? Would we consider it money and why or why not?

Estimate the population mean number of pecks : Estimate the population mean number of pecks made by chickens pecking at blue string using a 99% confidence interval. Interpret the result.

Analyze implications of these policies and disparities : Compare the economic policies for health promotion, wellness, and prevention programs in the United States and the country you selected. Include differences in approaches to wellness and prevention. Analyze implications of these policies and disparit..

Identify the parameter of interest to the researchers : Identify the parameter of interest to the researchers.- Examine the dot plot. Does effect size have a normal distribution? Explain why your answer is irrelevant to the subsequent analysis.

Do you observe a phillips curve relation in the data : Plot the difference between the unemployment rate and the natural rate of unemployment (short term), and the inflation rate. Do you observe a Phillips curve relation in the data? What if you confine attention to particular sub-periods? Discuss.

What is a naive forecast of inflation : How do we know that the Phillips curve does not help in forecasting inflation?

Find the fraction of a set of measurements : Use Tchebysheff's theorem to find the fraction of a set of measurements that will lie within: 2 standard deviations of the mean (K = 2).

Conduct a test to compare the variation in hydrogen readings : Conduct a test to compare the variation in hydrogen readings for the two sampling schemes.- Test using α = .05.

User Account

All Pages