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Reflect on correlation and regression. Provide a plausible research question in the field of education that implies a bivariate correlation or regression. Identify your research question, your research (alternative) hypothesis, and your null hypothesis. Then, revise the question and hypotheses to reflect plausible research in which you would use a t test. Identify your research question, your research (alternative) hypothesis, and your null hypothesis. Also, identify your independent and dependent variable.
A random sample of 200 people was taken. Sixty percent of the people favor President Obama. The 95% confidence interval for the true population of people who favor Obama is?
How does the efficiency of a regression predict the power of the t-test? How do robust standard errors change the comparison between hypothesis testing using OLS and robust regression? What does dependence in the e do to the t-test? what does non-no..
What are the predictor and response variables? Make a scatterplot of the data and find r to see if a linear pattern seems to exist. If it appears to have a linear relationship, find the regression line. Dont forget to state what r is, and interpret..
What is the intercept for the logistic regression equation and What is a 95% confidence interval for the odds ratio
Construct a 99% confidence interval on the population mean height of all 1-year-old pine seedlings. What are the confidence limits? What statement can be made about the population mean height using the confidence interval?
Briefly describe co relational research. Name a variable from this study and one from the workplace that might prove to provide a co relational relationship
At the .05 level of significance, can we conclude the Middletown students stayed in their districts less time than the Brockton students? Use the five-step hypothesis testing procedure.
If the life of wild pheasants follows a normal distribution with a mean of 9 months and a variance of 9, what percent of the population will be less than 11 months of age?
Under what circumatances do you use a one-sided confidence interval instead of a 2 sided confidence interval?
A retail federation conducted a nationwide survey of 1000 adults last October and found that approximately 55% of the respondents planned to do some type of Halloween decorating.
Test the hypothesis that there is no difference in the mean scores of Exam 1 and Exam 2 against the alternative that the average is greater for the second exam.
Determine: SS(xy)Linear correlation coefficient, r. Bar graph below compares mean time in seconds for 7-yr old girls to complete certain task.
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