【判断题】游泳时千万不要在水中打闹,以免呛水或受伤。
【单选题】In calculating the regression equation linking two variables, the standard formulae for the regression coefficients are given in terms of X and Y. Which of the following is true?
A.
X must be the variable which will be forecast
B.
It does not matter which variable is which
C.
Y must be the dependent variable
D.
Y must be the variable shown on the vertical axis of a scatter diagram
【判断题】The coefficient of determination gives the proportion of the variability in the dependent variable that is explained by the regression equation.
【简答题】谷文昌和焦裕禄分别是在福建的 和 的兰考治理风沙。兰考除了风沙之外还有的自然灾害是 和 。
【单选题】为新事物的产生准备条件和开辟道路是第几次否定?
【简答题】科技查新的类型有哪些?科技查新的流程有哪些?
【单选题】《殽之战》中,晋文公去世,其子晋襄公“墨衰絰,穿上黑色的丧服以示哀痛。这体现了古代的哪个礼节?
【单选题】Changing the unit of measurement of any independent variable, where log of the dependent variable appears in the regression:
A.
affects only the intercept coefficient.
B.
affects only the slope coefficient.
C.
affects both the slope and intercept coefficients.
D.
affects neither the slope nor the intercept coefficient.