1. a
2. From Internet:
Trendlines have limitations shared by all charting tools in that they have to be readjusted as more price data comes in. A trendline will sometimes last for a long time, but eventually the price action will deviate enough that it needs to be updated.
1. If Data A has a correlation coefficient of r = -.991, and Data B has a correlation coefficient of r = .991, which interpretation is correct?
a. Data A and Data B have the same strength in linear correlation.
b. Data A has a weaker linear correlation than Data B.
c. Data A has a stronger linear correlation than Data B.
2. A limitation of using trend lines in prediction is that
a. the x values may not be constant.
b. the predictions are not valid for values outside the original domain of x values.
c. the correlation may need to be recalculated.
d. the relationship may be a spurious correlation.
2 answers
would #2 be C?