In testing the difference between two population means for which the population variances are unknown and not assumed to be equal, two independent samples are drawn from the populations. Which of the following tests is appropriate?
a. z-test c. unequal variances t-test
b. pooled-variances t-test d. None of these choices.
C
You might also like to view...
One effect on the accounting equation when a firm borrows money is
a. stockholders' equity decreases. b. assets increase. c. liabilities decrease. d. assets decrease.
Describe each of the value chain activities that can be converted into a competitive advantage, as proposed
by Michael Porter. What will be an ideal response?
What is the primary source of revenue for Skype, a company that offers free online video and phone service?
a. the money they charge for a connection b. the money they charge for Skypeout, the service that calls land lines and cell phones c. the long-distance fees d. the monthly subscription fee
Under the legal doctrine of "employment at will" an employee can be lawfully terminated from her job for: I. wearing a shirt that clashes with her suit II. any non-discriminatory reason III. complaining about illegal activity in the workplace IV. only for good cause
a. a. I only b. b. II only c. c. I and II d. d. III and IV