Consider the regression model Y = XB + ε. Assume X is stochastic and ε is such that E(X'=)= 0. However, there is a matrix of variables Z such that E(Z'E) = 0 and E(Z'XY= 0. The dimension of the matrix X is T xk (T is the
number of observations and k is the number of regressors) whereas the dimension of the matrix Z is Txq
with q> k.
1.Is B^ from a regression of Yon X consistent for ß?
2.Regress the matrix X on the matrix Z (i. e., you want to regress each column of X on the matrix Z). Express
the fitted values compactly as a function of X and Z.
3.Regress the observations Y on the fitted values from the previous regression (a Txk matrix). Express
compactly the new estimator as a function of X, Z, and Y. (Note: you could use a very specific idempotent
matrix here).
4.Is the new estimator consistent for B?
5. Assume k = q. Does the form of the estimator simplify?
6.(Interpret all of your previous results from an applied stand-point. Why are they useful? NEED IT DONE
ON TIME ONLY ACCEPT IF YOU UNDERSTAND

what is the graph

step-by-step explanation:

"it's not the heat, it's the humidity".   that's a partly valid phrase you may have heard in the summer, but it's actually both.   the heat index, also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature.   this has important considerations for the human body's comfort.   when the body gets too hot, it begins to perspire or sweat to cool itself off.   if the perspiration is not able to evaporate, the body cannot regulate its temperature.   evaporation is a cooling process.   when perspiration is evaporated off the body, it effectively reduces the body's temperature.   when the atmospheric moisture content (i.e. relative humidity) is high, the rate of perspiration from the body decreases.   in other words, the human body feels warmer in humid conditions.   the opposite is true when the relative humidity decreases because the rate of perspiration increases.   the body actually feels cooler in arid conditions.   there is direct relationship between the air temperature and relative humidity and the heat index, meaning as the air temperature and relative humidity increase (decrease), the heat index increases (decreases).

step-by-step explanation:

none of these

step-by-step explanation:

23 + 34 add up to 57 so just inform the teacher of this really stupid mistake