Research and Statistics in Psychology Tracy Charles PSY/315 October 14‚ 2012 Jennifer Slothower Research and Statistics in Psychology Psychologist need to adhere to scientific research methods when doing a study “the scientific method requires systematic observation and a willingness to modify understanding based on these observations” (Cloninger et al.‚ 2008). This method involves careful observation and collection of data to rule out theories that are not valid. “Scientific
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1. In the excel worksheet‚ we combined the 12% non-callable bond maturing in May 05 and the zero coupon STRIPS with the same maturity to get a synthetic bond with semiannual interest payments of $4.125 per $100 par value. The ask and bid prices of the synthetic bond are calculated to be $98.78 and $98.53. Alternatively‚ we combined the non-callable bond maturing in 2000 and the STRIPS 00 to get a synthetic bond to match the callable bond if it was called at the first possible date. The ask and
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mind that a statistic is only worthwhile when it satisfies the assumptions on the test. Knowing whether the assumptions are met is dependent on the competence of the person running the test. Just because two things seem to have a relationship‚ could it have been by pure chance? It cannot be determined by causation and effect. The two variables have no effect on each other at all. Chapter 9 – How to Statisticulate Statisticulate is the process of misleading people using statistics. It is also
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crime statistics fail to provide an accurate portrayal of the level of crime in society? Crime is ‘an action or omission which constitutes an offence which is punishable by law’ (Oxford Dictionary). Criminal behaviour is an issue in society today. Crime statistics providing evidence is vastly important because the government or police forces can look at the level of crime‚ identify if is increasing or decreasing; remedy the situation using prevention tactics. Consequently‚ the statistics are influenced
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SSx= ∑ x2- (∑ x)2/n SSxy= ∑ xy- ∑ x*∑ y/n 3. Sample Y Intercept 4. Coeff. Of Determination 5. Std. Error of Estimate 6. Standard Error of 0 and 1 7. Test Statistic 8. Confidence Interval of 0 and 1 9. Confidence interval for mean value of Y given x 10. Prediction interval for a randomly chosen value of Y given x 11. Coeff. of Correlation 12. Adjusted R2 13. Variance Inflation Factor 14. Beta Weights 15. Partial F Test SSER
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The Columbian Exchange Statistics By the Numbers Estimated population of Europe in 1492: about 60 million Estimated population of the Americas in 1492: 40-100 million Estimated population of Europe in 1800: 150 million Estimated population of the Americas in 1800: 25 million (the vast majority of whom were of European or African descent) Major domesticated animals in the New World in 1492: dog‚ llama Major domesticated animals in the Old World in 1492: horse‚ cow‚ pig‚ sheep‚ goat‚ chicken
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(copying) or any other attempt to gain an academic advantage in a dishonest or unfair manner. Breaches of the Academic Honesty Policy will result in dismissal from HCT Project Objectives: To estimate the population parameters from sample statistics‚ using interval estimate (90%‚ 95% and 99% levels). The project consists of three parts as listed below. You should carefully read the instructions. This project is Group based (2 – 3) and each Group will have different results based on the initial data
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Covartiation: change in one and change in the other‚ will the two move together. Nonspurioussness: no alternative example. Mean- use when #’s are in interval and no outliers. Median-not sensitive to outliers‚ useful in ordinal- only captures small amount of information about the sample. Mode- the most frequent # will work with nominal‚ ordinal or interval. Positively skewed data- is positively skewed because most of the scores tend to cluster toward the lower end of the scale with increasingly fewer
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Descriptive Statistics is used when describing certain aspects of an immediate group within the population. For example‚ we may want to describe a math class and compare it to a class of science. Things that we may want to use for comparison would be age‚ gender‚ and even math skills. Descriptive statistics would allow us to analyze all those different areas and provide a comparison to view similarities‚ differences and ratios. Before any study is to be observed certain factors would have to be ascertained
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FHE INC. FHE‚ Inc. is a manufacturer of pumps and related fluid-handling equipment used primarily by the automobile‚ appliance‚ and construction industries. For a five year period sales and profits have risen due to aggressive new product introduction. However‚ aggressive new product introduction has resulted in bottlenecks in the engineering services department and a breakdown of communication and coordination among management and departments. There are several steps Lum Donaldson needs to adopt
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