True coefficient of correlation

Reference no: EM13977516

1. Testing the null hypothesis that the slope of the true regression line equals zero is equivalent to testing whether the true coefficient of correlation could be zero. Why?

2. For n 5 15 data points, r2 5 0.81. At the 0.05 level of significance, can we conclude that the true coefficient of correlation could be zero?

3. For n 5 37 data points, r2 5 0.29. At the 0.02 level of significance, can we conclude that the true coefficient of correlation could be zero?

4. Based on sample data, the 90% confidence interval for the slope of the population regression line is found to be from -2.5 to 1.4. Based on this information, what is the most accurate statement that can be made about the p-value in testing H0: /31 5 0 versus H1: /31 * 0? Explain.

Reference no: EM13977516

Questions Cloud

Explain whether you think an autobiographical : Explain whether you think the representations of slavery in the visual arts (such as William Blake's illustrations, William Hackwood's cameo, or John Singleton Copley's painting) were more compelling and convincing of the injustices of slavery than l..

Find the wavelength of the photon : Find the wavelength λn of the photon that must be absorbed by an electron to move it from the nth state of a box to the (n+1)th state. Assume that the box has length L and that the electron has mass m.

Determine the least-squares regression line : Determine the least-squares regression line and interpret its slope. Estimate, for a new employee who scores 60 on the sales aptitude test, the number of units the new employee will sell in her first 3 months with the company.

Write a brief business message delivering bad news : You will write a brief business message delivering bad news. A bad news message can be written in either a direct approach or an indirect approach. For this assignment, please use the indirect approach, and include an appropriate buffer. At the ..

True coefficient of correlation : Testing the null hypothesis that the slope of the true regression line equals zero is equivalent to testing whether the true coefficient of correlation could be zero. Why?

Compare common methods of consulting : "Positive Deviance Method and Research Approaches" Please discuss the following: Compare and contrast the more common methods of consulting with the positive deviance method

Prepare an income statement for january : Indicate the effect of each transaction and the balances after each transaction, using the following tabular headings:

Determine the least-squares equation for predict : Given these data, determine the least-squares equation for predict- ing gross revenue on the basis of the number of equity partners, then interpret its slope. What would be the estimated gross revenue for a firm with 200 equity partners? Sourc..

User Account

All Pages