Question 2 It would be a one-tailed test. Hypothesis for an one-tail test: Ho:μHo≥μHa Compute Zobt: The Z critical Value = ±1.645 Ho: should be rejected, the researcher should conclude that the new toothpaste prefix better at helping prevent cavities. 95% confident that the population mean is within the range: Question 4 This is a type two error Question 6 Yes, this is a two-tailed Ho:μo≠μ1,μo<μ1 95% Confidence interval: 56.80479 < µ < 61.19521 2.160 No, The researcher should
Data Analysis and Interpretation In selecting the appropriate statistical test for your data analysis, you need to identify the question or hypothesis for the study. Are you trying to compare groups, interested in finding out if there is a relationship between two or more variables, or are you trying to predict. Some factors to consider as well are the following: (1) Research design, (2) Level of measurement: nominal, ordinal, interval, ratio, (3) Number of groups, and if they are correlated (dependent)
What are degrees of freedom? The degrees of freedom (df) of an estimate is the number or function of sample size of information on which the estimate is based and are free to vary relating to the sample size (Jackson, 2012; Trochim & Donnelly, 2008). How are the calculated? The degrees of freedom for an estimate equals the number of values minus the number of factors expected en route to the approximation in question. Therefore, the degrees of freedom of an estimate of variance is equal to N
We present an overview of literature on nonparametric or distribution-free control charts for uni-variate variable data. We highlight various advantages of these charts while pointing out some of the disadvantages of the more traditional, distribution based control charts. Specific observations are made in the course of review of articles and constructive criticism is offered so that opportunities for further research can be identified. Connections to some areas of active research are made, such
Chapter VIII Summary, Conclusions and Suggestions 8.1 Summary and Conclusions: A brief summary to grasp the results and identify important outcomes on the basis of analysis done in the previous chapters can be presented as follows: Banks are the life-blood of modern economy. They help in mobilizing the nation’s saving and on the other hand, they channelize these saving into high investment priorities.Indian banking system comprises of both organized and unorganized banks. Unorganized banking includes
Calculus I is the first university mathematics class many of our students have to take, our goal is to teach them not only math content but also train them to become independent and skilled problem solvers in those problems that require the techniques and concepts of calculus. The idea of inverted classroom is that the students learn best when they are actively working on a task rather than passively listening to the lecture. This approach to doing class is sometimes called the "flipped classroom"
what the test group may think. It does this by making judgment of the chance that a difference that is observed between the groups is indeed one that can be counted on that could have otherwise happened by coincidence. In order to help solve the issue of generalization, tests of significance are used. For example, a chi-square test or T-test provides a person with the probability that the analysis’ sample results may or may not represent the respective population. In other words, the tests of significance
T , that is, T − θ. Similarly, the estimated bootstrap variance of T ∗ , V ∗ (T ∗ ) = R ∗ b=1 (Tb ∗ − T )2 R−1 estimates the sampling variance of T . The random selection of bootstrap samples is not an essential aspect of the nonparametric bootstrap: At least in principle, we could enumerate all bootstrap samples of size n. Then we could calculate E ∗ (T ∗ ) and V ∗ (T ∗ ) exactly, rather than having to estimate them. The number of bootstrap samples, however, is astronomically
The placebo effect is a phenomenon of human health improvement due to the fact that one believes in the effectiveness of certain effects, which in fact are neutral. The degree of this effect depends on the degree of human suggestibility and external circumstances of suggestion. This is therapeutic inculcation. It does not require any special skills, because criticality of consciousness can get overcome by binding instilled information to the actual object, tablet or injection. The placebo effect
In this research article “Forecasting Management Philosophy Life Cycles: A Comparative Study of Six Sigma and TQM,” the author emphasizes on the “Management fads & their life cycles”. Management fad characterizes a change in a management philosophy applied by the organization. Small scale changes may apply on a broader scope while switching from one philosophy to another. Although it always magnifies the firm’s knowledge, making them much more efficient with the value-added output. This study takes