The hypothesis or alternate hypothesis is usually hidden in a word problem, and is sometimes a statement of what you expect to happen in the experiment or a claim of what will happen. Null hypothesis is statement of what will happen if the hypothesis or alternate doesn’t come true. Null hypothesis is the opposite statement […]
Statistically significant means a result is unlikely due to chance. The p-value is the probability of obtaining the difference we saw from a sample (or a larger one) if there really isn’t a difference for all users. A conventional (and arbitrary) threshold for declaring statistical significance is a p-value of less than 0.05. Statistical significance […]
To determine whether a result is statistically significant, a researcher would have to calculate a p-value, which is the probability of observing an effect given that the null hypothesis is true. The null hypothesis is rejected if the p-value is less than the significance or α level. Just because you get a low p-value and conclude a difference is […]
A general discussion of significance tests for relationships between two continuous variables. Factors in relationships between two variables The strength of the relationship: is indicated by the correlation coefficient: r but is actually measured by the coefficient of determination: r2 The significance of the relationship is expressed in probability levels: p (e.g., significant at p =.05) This tells how unlikely a given correlation coefficient, r, will […]
ANOVA R’s socioeconomic index (2010) Sum of Squares df Mean Square F Sig. Between Groups 474058.682 4 118514.671 385.981 .000 Within Groups 743670.506 2422 307.048 Total 1217729.188 2426 Test of Homogeneity of Variances R’s socioeconomic index (2010) Levene Statistic df1 df2 Sig. 23.938 4 2422 .000 Multiple Comparisons Dependent […]
It is important to first understand what an acquired brain injury is. Acquired brain injury is a type of brain impairment that happens after birth, which is not connected to an inherited or worsening disease (Powell River Brain Injury Society, n.d.). Twenty-four community college study with acquired brain injury filled out questionnaires and other standardized […]
Descriptive research design helps in gathering information that will display relationships between variables without changing the environment (U.S Department of Health and Human Services: The Office of Research Integrity, n.d.). The use of independent sample t-test is an appropriate choice for a study of t-test method that compares means of two groups of cases. When […]
Using the SPSS software, open the High School Longitudinal Study dataset found in this week’s Learning Resources and construct a research question that involves a comparison of a means test. Use SPSS to answer the research question you constructed and post your response to the following: What is your research question? My research question is: […]
T-test compares two means across an independent categorical variables. For example, my independent t-test is to test for any possible difference in comparison across student’s sex and their socio-economic status composite.
Sample Problem Statement: A research paper claims a meaningful contribution to the literature based on finding statistically significant relationships between predictor and response variables. In the footnotes, you see the following statement, “given this research was exploratory in nature, traditional levels of significance to reject the null hypotheses were relaxed to the .10 level.” Post […]
