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Warm-up Activity
Download G*Power and play around with it. See how changes in assumptions and parameters affect sample size estimates.Part 1
Part 2If you do a quantitative study for your dissertation, you must estimate the sample size you will need in order to have a reasonable chance of finding a relationship among the variables stated in your research hypotheses (should one exist), given your statistical analysis(es) and assumptions/calculations of factors 2-4 above. You must do this, even if you plan to use a convenience sample (see below). There are a number of sample size calculators available. Northcentral uses G*Power, which is required in this Activity. You will use G*Power's "a priori power analysis" function to calculate a sample size. If it yields an unrealistically large size sample, you will rethink your design and assumptions and, perhaps, use G*Power's "compromise power analysis" to estimate a workable sample size that makes sense. If you plan on using a convenience sample, you would use both analyses as part of your argument that your convenience sample is large enough.
What proportion of trucks can be expected to travel between 80,000 and 120,000 kilometres in the year and what percentage of trucks can be expected to travel either below 60,000 or above 140,000 kilometres in the year -How many kilometres will be tra..
Statistics from Cornell's Northeast Regional Climate Center indicate that Ithaca, NY, gets an average of 35.4" of rain each year with a standard deviation of 4.2". Assume the data is normally distributed.
A survey of people in Iowa showed that 40 out of 400 prefer watching TV comedy shows. Another survey in Colorado showed that 90 out of 600 prefer watching TV comedy shows. At a 1% significance level, would it seem that the true proportions of p..
conceptual questionswhat is the difference between descriptive and inferential statistics?what are the five
Respond to the following: Give two examples as follows: A research situation when you would use a two-sample test with independent samples A research situation when you would use a two-sample test with dependent samples
2. The mean BMI in patients free of diabetes was elsewhere reported as 28.2. The researcher producing the data in question 1 wonders if the BMI in his patients free of diabetes is higher than this reported number.
The manager of a gas station and convenience store
1.if your data is a random sample of size n from the distribution N(4, 7), then what is the distribution of the statistic X(not Z or T)? Z?T?
A.) Blood type AB is found in only 3% of the population. If 165 people are chosen at random, find the probability of the following. (Round your answers to four decimal places.)
Estimate the difference between the proportion of the population of low birth weight children and the proportion of the population of normal birth weight children who graduate from high school. Report a standard error for your estimate.
Health plans use many tools to try to control the cost of prescription medicines. For older drugs, generic substitutes that are equivalent to name brand drugs are sometimes available at a lower cost. Another tool that may lower costs is restrictin..
Henry performed a two-tailed test for an experiment in which N=24. He could not find his table of t critical values, but he remembered the tcv at df=13. He decided to compare his tobt with this tcv. Is he more likely to make a Type I or a Type II err..
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