In your own words describe why we should use both samples to estimate the variance of the population when working with an independent two-sample design
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In your own words describe why we should use both samples to estimate the variance of the population when working with an independent two-sample design?
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- Suppose that you are interested in estimating a population mean. You select a random sample of items, and compute the sample mean and the sample standard deviation. You then compute a 95% confidence interval to be LCL=28.4 - UCL=37.9. So what does that mean? It means that you are 95% confident that the unknown population mean that you are estimating is between the LCL and UCL. So what does that mean? It means that if you were to iterate this sampling process many times, say 100, and calculate 100 confidence intervals, then 95 of those intervals will contain the unknown population mean, and 5 will not. Give me an example of how CI can be used in your work. FYI I work in Endocrinology dept. Specific diabetesProvide an example of a research project in your hometown where you would choose to use a t-test for independent samples. Would you use a one-tail or two-tail test, and why? What is your null hypothesis and research hypothesis? If you have a sample size of 500, should you interpret the statistical significance or the effect size?A Researcher decided to put students into groups based on their Cumulative Weighted Averages and had four different groups. He then systematically selected one student from each group and assigned some clear roles and responsibilities. Here, the researcher used ……………………..in selecting the students. In a short sentence each, explain THREE of the sampling types
- Consider a clustered and ordered population of size N=10. Use systematic sampling with i = 2 , to obtain a clustered random sample of size n=5. Compute the variance of the cluster mean estimate of population mean. Please give correct solution.What is the value of a random sample? Will random sampling always ensure that a sample is representative of a population? Explain your answer.Describe in your own words what variance measures. Then explain why the variance of both samples must be used in the calculation of a t-test (In other words, explain why we have to factor in the variance when comparing the means).
- Give typing answer with explanation and conclusion How to code time-varying covariate in scm for population PK modeling ?What factors in a population would mean that the Hardy-Weinberg principle does not apply?Why is the Hardy Weinberg principle often violated in real populations? Justify your answers with different examples.
- I have a large number for my standard deviation. What does this tell me about the variability in my data? Select one: the variability is just right the variability is low the variability is high more data is neededWhat does P-value indicate? In statistical analysis the results for two sets of data are presented with P < 0.01 and P<0.005. What does it mean?c) If no genetic variation was observed within a particular population for a given trait, what will be the computed broad sense heritability value for the trait in the population? Show solution to justify your answer.
