Other sets by this creator
Refer to Exercise . Using an experiment wise error rate of .05, Tukey confidence intervals for the difference between mean rates of return for all possible pairs of fund types are given below.
|Comparison||Tukey Confidence Interval|
d. Is there a substantial difference between the treatment means for medium-cap and small-cap mutual funds? Exemplify.
Observations are taken on net revenue from sales of a certain plasma TV at 50 retail outlets. The regression model was Y= net revenue (thousands of dollars), shipping cost (dollars per unit), expenditures on print advertising (thousands of dollars), expenditure on electronic media ads (thousands), rebate rate (percent of retail price). (a) Calculate the t statistic for each coefficient to test for . (b) Look up the critical value of Student's t in Appendix D for a two-tailed test at . Which coefficients differ significantly from zero? (c) Use Excel to find the p-value for each coefficient.
A hypothesis says for a specific population: H0: Of the observations, 40% fall under group A, 40% under category B, and 20% fall under category C. H1: The observational distribution does not match the description in H0. The results of our sample of 60 observations from the population are as follows.
What is your decision regarding H0?