A test preparation company wants to test its claim about the consistency that it sees in test scores for its customers. Prior research has shown that the variance on the test is 20. The test company believes that its customers are more consistent in their scores than the general population. To test this, they sample 10 customers and find that they have a variance of 18. What is the value of the test statistic for their hypothesis test?

Based on the evidence available, which of the following characteristics occurred first in human evolution?

With respect to windfall profits taxes, which of the following are correct:

The wealth tax has proved to be so difficult to administer that the number of countries imposing a wealth tax has dropped from 12 to 5 in the past three decades.

Stock buyback taxes do not hurt investment and innovation.

When governments need revenue, only the most efficient taxes last. 

Consistent with lawmakers’ intuitions, corporate managers will not underreport income to shareholders as a means of lowering their tax liability.

Exempting industries or products from taxation can lead to market distortions and benefit wealthy and poor consumers alike. 

With respect to stock buyback taxes, which of the following are correct:

According to Warren Buffet, “When you are told that all [stock] repurchases are harmful to shareholders or to the country, or particularly beneficial to CEOs, you are listening to either n economic illiterate or a silver-tongued demagogue (characters that are not mutually exclusive).”