Discuss the difference between dependent and independent samples and how they are utilized in hypotheses testing. Tests of Hypothesis Analysis of Variables are the chapter topics.
Two samples are dependent if the members of one sample can be used to determine the members of the other sample. That means they are related in some manner, like observations before and after, matched pairs, etc.
Eg. The marks obtained by students of a particular class when they are in 9th grade and 10th grade are dependent as the marks obtained are of same people.
On the other hand, Two samples are independent if the sample values selected from one population are not related or somehow paired or matched with the sample values selected from the other population.
Eg. Marks obtained by by students in 9th grade belonging to two different division(section).
In testing of hypothesis, to check the equality of population means where the two samples are dependent (for example weights of a sample of people before and after joing gym) we general use paired t-test to examine the hypothesis. Whereas, if the samples are independent (Eg. maximum speed of car manufactured and build by two different companies) We use two sample t test to test the hypothesis.
Discuss the difference between dependent and independent samples and how they are utilized in hypotheses testing....
Define and give an example of dependent vs. independent samples, and indicate why, in two population testing it is critical for reliable hypothesis testing. Dependent: Independent: Why Critical?
Discuss the five steps in hypothesis testing, citing examples where necessary. Define null and research hypotheses. Explain how to prepare data for hypothesis testing. Describe exploratory data analysis as a prelude to hypothesis testing. Distinguish between Type I and II errors. What are the implications of each?
Suppose that based on two independent samples, the 95% confidence interval for the difference between two population proportions, p1−p2 is (-0.29, -0.01). If a test of hypotheses H0: p1−p2 = 0 versus Ha: p1−p2 ≠ 0 was conducted at 0.05 level of significance based on these samples, the decision would be to .. retain the null hypothesis? reject the null hypothesis?
How do you know if a hypothesis test is testing the claim between 2 population proportions or 2 means? How is the test statistic for a claim about 2 population means, independent samples, standard deviations unknown, similar to the test statistic for 1 population mean, standard deviation unknown? If the difference between the 2 population means is not significant, which means the test statistic falls within the "usual" area of the distribution, what is the decision about the null hypothesis?...
When testing the difference between two population proportions using large independent random samples, the __________ test statistic is used. z F t None of the other choices is correct. chi-square
1) If a statistically significant difference exists between groups relative to a specific variable, but that difference is so small as to have little importance to the manager, the researcher failed the _____ test. a) exploratory data analysis b) bayesian statistics c) classical statistics d) Statistical Significance e) practical significance 2) To compare productivity measurements taken from two separate manufacturing plants in hypothesis testing, we need a _____. a) one-sample test b) two-independent-samples test c) two-related-samples test d) k-indpendents-samples test...
7. What is the difference between independent and dependent demand, and how does this difference affect inventory control? 8. What are the underlying assumptions of the basic EOQ (economic Order Quantity) model? 9. What is the relation between ordering and carrying costs if an EOQ is used?
Explain the difference between an independent entity and a dependent entity and explain how the two types are differentiated on the data model.
How is the Dependent Samples t Test different from Independent samples t Test in terms of samples? What are similarities in the assumptions behind both the Dependent and Independent Samples t Test? What is Dependent Samples t Test with one sample also known as In a dependent Samples t test what is the df for a sample of 100 participants in a particular study?
What is the difference between dependent and independent variable?