Asurprising discovery. an intern at a quantitative hedge fund examines the daily returns of around 400 stocks over one year (which has 250 trading days). she tells her supervisor that she has discovered that the returns of one of the stocks, google (goog), can be expressed as a linear combination of the others, which include many stocks that are unrelated to google (say, in a different type of business or sector). her supervisor then says: "it is overwhelmingly unlikely that a linear combination of the returns of unrelated companies can reproduce the daily return of goog. so you’ve made a mistake in your calculations." is the supervisor right? did the intern make a mistake? give a very brief explanation.

When paul o’neill joined alcoa as ceo, he set a , that there would be zero workplace accidents. a lot of people in the organization thought this was impossible given how dangerous some aluminum-manufacturing jobs are, but alcoa’s safety record improved tremendously. as the board of governors of the american red cross considers planning, one option is to make strategic plans and then direct managers to align tactical and operational plans accordingly. another option is to have planning specialists managers across the organization make their own plans. why might this organization’s executives opt for the latter approach? check all that apply. (a) the environment is a dynamic one, and department and frontline managers can come up with more responsive plans than can central leadership. (b)resources will be better coordinated across the organization in support of the overall strategy.(c) senior leadership will have more control over the organization’s direction. (d)when managers come up with their own plans, they are likely to be more committed to following through on them.