Which of the following settings constitutes an interpolation?
A. Using past sales, and price information to make a forecast for next year's sales growth.
B. Using a randomized control trial to estimate the causal effect of the use of a cancer treatment on health outcomes.
C. Using 2014 and 2016 data on GDP to estimate GDP in the third quarter of 2015, which is missing.
D. Using past sales, and price information to estimate last year's price elasticity of demand.
Answer: C
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The directional nature of the DNA double helix is observed in the
A) locations of the hydrogen bonds. B) locations of the numbered carbons in the sugars. C) locations of the oxygen atom in the phosphate. D) double helix when it is separated into single strands.
The reason humans inhale oxygen is so that it can be used for:
What will be an ideal response?
If pregnancy does not occur, ____
a. LH levels rapidly rise b. the corpus luteum degenerates c. estrogen and progesterone levels rise d. the endometrium thickens e. the luteal phase begins
In salt marshes, predatory fish move in when
A) the tide is high. B) migratory fishes are spawning. C) the sun goes down. D) salinity is low.