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Designing a study
Create an example of a research question in an imaginary quantitative NURSING study you might design.
Identify the independent and dependent variable, and state the research hypothesis for your study. The variables must be categorical variables.
Select a nonparametric test from chapter 12 that would effectively test this hypothesis.
Describe how you can test the above hypothesis using that nonparametric test.
Assuming that the distribution of the salaries is normal, what is the probability that the average for this sample is between $36,000 and $42,000.
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
When the null hypothesis is rejected in the goodness-of-fit test, it means there is close agreement between the observed and expected frequencies.
What is the 95 percent interval for the population mean?
A coin-operated coffee vending machine dispenses, on the average, 6 oz of coffee per cup. Can this statement be true of a vending machine that occasionally dispenses only enough to fill the cup half full (say, 4 oz)?
If a weather center monitors and calculates the average number of tornadoes that pass through Topeka, Kansas each year, what type of variable would they investigating?
A seven member committee of students is formed to study environmental issues. What is the likely hood that anyone of the seven is chosen as the spokes person?
To compare the effectiveness of two treatments 1 and 2 for a particular disease. Patients were separated in 2 treatment groups. A patient in group 1 received treatment 1 and patients in group 2 received treatment 2.
Assume men's weights are normally distributed w/ a mean of 172 lb. and a s.d. of 29lb.
Find a 99% confidence interval for mu1-mu2, the difference in population means when it is known in advance that the population variances are 4 and 5 respectively.
How can you tell when you should use the ANOVA versus a t-test? What is one problem with using the ANOVA when the t-test is the appropriate data analysis?
Suppose among 312 large city residents sampled, 65 refused to cooperate. What is the margin of error at the 95% confidence level.
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