When constructing a confidence interval for the population mean using the standard deviation of the sample, the degrees of freedom for the t distribution equals
A. n - 1.
B. n.
C. 2n.
D. n + 1.
Answer: A
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A) editing B) coding C) validating D) pretesting E) transcribing
Which of the following is a belief held by advocates of the humanist school of ethical thought?
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One important reason to study the purchasing power parity theory is because
A) investors should borrow in a foreign currency, when there is a forward discount. B) when inflation rates differ across international borders, PPP provides a baseline forecast of future exchange rates. C) forecasting exchange rates is difficult and PPP makes it easier. D) it provides currency dealers with a way to identify arbitrage opportunities.
The following SQL statement uses a(n) SELECT P_CODE, P_DESCRIPT, P_PRICE_V_ NAME FROM PRODUCT, VENDOR _ WHERE PRODUCT,V_CODE=VENDOR. V CODE
a. set operator b. natural join c. "old-style" join d. procedural statement