The symbol for the variance of a sample of observations (of a quantitative variable) is:
a. s2
b. a2
c. s
d. a
Answer: a. S2
Explanation: The variance of the sample observation is denoted by S2 and that of the population is given by ?2.
You might also like to view...
In the 18th century, Southern tobacco planters found that the use of ____________ was economical once the plantation reached a certain size
a. horses b. a plantation manager c. indentured servants d. an iron plow
For most goods, the real-income effect of a price change is
A) small because the good accounts for a small part of the consumer's budget. B) small because the decision to buy a good depends only on the income of a consumer. C) large because the price of the good is in terms of the currency and the income of the person is also in terms of the currency. D) zero because the real-income effect only applies to durable goods.
If there is currently a shortage of dollars, which of the following would you expect to see in the foreign exchange market?
A) The dollar will appreciate. B) The dollar will depreciate. C) There will be an increase in the demand for dollars. D) There will be an increase in the supply of dollars.
One difference between a monopoly and a competitive firm is that
A) a monopoly is a price taker. B) a monopoly maximizes profit by setting marginal revenue equal to marginal cost. C) a monopoly faces a downward sloping demand curve. D) None of the above.