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A researcher can test at the p < .05, p < .01, or p < .001 level for statistical significance. How can these three levels be used to evaluate risk to patients in implementing decisions based on research findings?
To answer the question, describe a study (real or hypothetical) where:
- a statistical significance of p<.05 would be acceptable when considering risk to patients- a statistical significance of p<.01 would be the minimum acceptable when considering risk to patients- a statistical significance of p<.001 would be the minimum acceptable when considering risk to patients
What can we say about the probability distribution of x? Is it approximately normal? What are the mean and standard deviation?
At.01 significance level, can we conclude that 30-year mortgage rate for small banks is less than 6%? Evaluate the p-value.
The average cost of a one bedroom apartment in a town is $550 per month. What is the probability of randomly selecting a sample of 50 one bedroom apartments in this town and getting a sample mean of less then $530 if the population standard deviat..
The parameter of interest is the mean score in this population. The sample is an SRS of size n = 4 drawn from the population. a) Find the mean of the 10 scores in the population. This is the population mean.
With standard deviation of 15. Test hypothesis that Mrs. Smith and Mrs. Jones are equally effective teachers. Use 0.10 level of significance.
Differences in Descriptive and Inferential Statistics and analyze the differences between descriptive and inferential statistics.
10 cobalts are ramdomly selected and the miles per gallon for each car are recorded. What is the probability that the mean miles per gallon exceeds 34 miles per gallon?
Using the .05 level, what should the researcher conclude? Solve this problem explicitly using all five steps of hypothesis testing.
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter.
The January 17, 1994 issue of Time magazine reported that 58% of adult Americans said yes to the question "If you or your spouse were pregnant, would you want the unborn child tested for genetic defects?"
The production department wants to explore the relationship between the number of employees who assemble a subassembly and the number produced. The complete set of paired observations follows:
Pretests, posttests and threats to internal validity and please discuss all threats to internal validity.
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