1298 WordsMar 16, 20136 Pages

Researchers routinely choose an ◊-level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower ◊-level (e.g., 0.01)? What are some situations in which you might accept a higher level (e.g., 0.1)?
An alpha level of 0.05 is arbitrary and was set as a standard by scientists. One of the key concepts in hypothesis testing is that of significance level or, the alpha level, which specifies the probability level for the evidence to be an unreasonable estimate. Unreasonable means that the estimate should not have taken its particular value unless some non-chance factor(s) had operated to alter the nature of the sample such that it was no longer representative of the population of interest. (Price, 2000)*…show more content…*

(2000). What Alpha Level? In I. Price, Inferential Statistics (p. Chapter 5). New England: University of New England.
University of Texas-Houston Health Science Center . (2013). Hypothesis Testing . Retrieved March 21, 2013, from Biostatistics for the Clinician : http://www.uth.tmc.edu/uth_orgs/educ_dev/oser/L2_2.HTM
4DQ1
How would you explain the analysis of variance, assuming that your audience has not had a statistics class before?
When examining the differences between two or more groups, you can use the analysis of variance which is known as ANOVA. This is a statistical technique that is used to compare the means or averages of more than two groups. There are three uses of ANOVA which are the one-way, the two-way and N-way Multivariate ANOVA. (Solutions, 2013) The determining factor when to use one of the “ways” is dependent upon how many “treatments” are used in the study. We use the term treatment because ANOVA originated in the 1920’s to test different treatments of fertilizers’ crop yields. ("Analysis of Variance," 2012, p. 2) Here, we will cover the one-way and the two-way ANOVA.
The one-way between groups, ANOVA is used when you want to test the difference between two or more groups. This is the simplest version of ANOVA. (Crossman, 2013) This could be used for example in a study on the ages of patients on different cardiac medications. Here we are only looking at

Related

## Qnt561 One and Two Samples Sets Week 5

1417 Words | 6 PagesOne- and Two-Sample Tests of Hypothesis, Variance, and Chi-squared Analysis Problem Sets University of Phoenix Applied Business Research and Statistics QNT 561 August 5, 2011 Chapter 10 Exercise Question 31: A new weight-watching company, Weight Reducers International, advertises that those who join will lose, on the average, 10 pounds the first two weeks with a standard deviation of 2.8 pounds. A random sample of 50 people who joined the new weight reduction program revealed the mean

## Normal Distribution and Khan Academy Website

2679 Words | 11 Pagespresentation; experimental design; descriptive statistics; sampling methods; and z, t, and chi-square. 3.0 None None Additional Material Textbook Statistics for Health Care Research: A Practical Workbook Grove, S. (2007). Statistics for health care research: a practical workbook. (1st ed.). St. Louis, MO: Saunders Elsevier. ISBN-13: 9781416002260 (Includes only Exercises 16, 27, 29, 31, 36, and 40) (Available as eBook) http://gcumedia.com/digital-resources/ elsevier/2007/statistics-for-health-careresearch_ebook_1e

## The Study Of Osteoporotic Fractures

1320 Words | 6 Pagesas the follow-up visit. At SOF visit 9, 1,513 women from 3 of the 4 original SOF sites attended a clinic visit for a cognitive status assessment, and therefore only participants from those 3 sites are included in this study. We included 1,470 women (40% of survivors in participating sites) who had anxiety assessment at SOF visit 8 (2002-2004; baseline) and had cognitive status assessment at SOF visit 9 (2006-2008; follow-up). Of those 1,470 women with complete exposure and outcome data, we excluded

## Distribution Mapping and Dealer Satisfaction Survey for Nokia Phones

5946 Words | 24 Pagesd. Statistical Analysis (Percentage analysis) 22 e. Statistical Analysis (Chi-square) 24 Chapter 4 i. Conclusions and Discussion a) Summary of Findings 34 b) Suggestions & Recommendations 35 c) Conclusions 35 Chapter 5 i. Appendix 37 ii. References: 39 LIST OF TABLES Table Name P. No. 1. Comparing Shaded Boxes to Total Boxes 18 2 . Chi-Square Test Table a) Sex and satisfaction with feature of Nokia phone. 22 b)

## Probability and Statistics

8229 Words | 33 Pages............22 THE CHI Square Test (Enumeration Analysis) ............................................................ 24 Introduction ................................................................................................................................................................24 THE CHI Test ............................................................................................................................................................24 CHI- Square Test Requirements

## Relationship Between Current Shift Work And Work Related Stress Symptoms Among Healthcare Workers From A Clinical Setting

1334 Words | 6 Pagescross-sectional study was conducted from January to July 2014, Participants completed demographic, occupational and lifestyle questionnaire, and a self-reported work-related stress symptoms instrument. RESULTS: The Study sample consisted of 160 (80%) females and 40 (20%) males. Mean age was 35.1 ± 9.1. Overall, no significant differences were seen in physiological, social behavior, intellectual and occupational and psych emotional symptoms in shift workers compared to day workers. In a stratified analysis, statistically

## Postpartum Depression And The Postpartum Period

2037 Words | 9 Pageseffectiveness of exercise in reducing depressive symptoms with effect sizes ranging from moderate (Hedges’ g = -0.40) to very large (Hedges’ g= -1.39) (21-23). Indeed, a recent Cochrane review found exercise to be as effective as anti-depressants and psychotherapy in adults; however, postpartum women were specifically excluded (24). The impact of exercise during the postpartum period on depressive symptoms is an emerging area of research. The only meta-analysis examining the impact of exercise as a treatment

## Gender Stereotyping And The Influence Of Race Essay

2042 Words | 9 PagesHannon, J., Soohoo, S., Reel, J., & Ratliffe, T. (2009). Gender stereotyping and the influence of race in sport among adolescents. Research quarterly for exercise and sport, 80(3), 676-684. 1) James Hannon utilized the stratified sampling method to conduct his study. This method allows you to make the sample as representative as possible. For instance individuals would be divided into groups or strata this allows the sample to show an accurate representation and reflection of the population being

## Essay about econ3208 midsem 2011

2457 Words | 10 PagesPHDs. Th ink 10. Refer to the model and estimates in the previous question. You want to test that ceteris paribus, men and women have the same probability of earning >$500,000. Under the null, the Wald test statistic is asymptotically chi-squared distributed with a. 1 degree of freedom b. 90 degrees of freedom c. 93 degrees of freedom d. 2 degrees of freedom e. 3 degrees of freedom -4- Th ink sw ap Do ECON 3208/3291 ECONOMETRIC METHODS Mid-term exam SEMESTER 2

## One- and Two-Sample Tests of Hypothesis, Variance, and Chi-Squared Analysis Problem Sets

1857 Words | 8 PagesOne- and Two-Sample Tests of Hypothesis, Variance, and Chi-squared Analysis Problem Sets • Exercises 19 and 20 (Ch. 17) Chapter 10 31. A new weight-watching company, Weight Reducers International, advertises that those who join will lose, on the average, 10 pounds the first two weeks with a standard deviation of 2.8 pounds. A random sample of 50 people who joined the new weight reduction program revealed the mean loss to be 9 pounds. At the .05 level of significance, can we conclude that those

### Qnt561 One and Two Samples Sets Week 5

1417 Words | 6 Pages### Normal Distribution and Khan Academy Website

2679 Words | 11 Pages### The Study Of Osteoporotic Fractures

1320 Words | 6 Pages### Distribution Mapping and Dealer Satisfaction Survey for Nokia Phones

5946 Words | 24 Pages### Probability and Statistics

8229 Words | 33 Pages### Relationship Between Current Shift Work And Work Related Stress Symptoms Among Healthcare Workers From A Clinical Setting

1334 Words | 6 Pages### Postpartum Depression And The Postpartum Period

2037 Words | 9 Pages### Gender Stereotyping And The Influence Of Race Essay

2042 Words | 9 Pages### Essay about econ3208 midsem 2011

2457 Words | 10 Pages### One- and Two-Sample Tests of Hypothesis, Variance, and Chi-Squared Analysis Problem Sets

1857 Words | 8 Pages