State with brief reason whether the following statements are true, false, or uncertain:a. In the presence of heteroscedasticity
OLS estimators are biased as well as inefficient.b. If heteroscedasticity is present, the conventional t and F tests are invalid.c. In the presence of heteroscedasticity the usual OLS method always overestimates the standard errors of estimators.d. If residuals estimated from an OLS regression exhibit a systematic pattern, it means heteroscedasticity is present in the data.e. There is no general test of heteroscedasticity that is free of any assumption about which variable the error term is correlated with.f. If a regression model is mis-specified (e.g., an important variable is omitted), the OLS residuals will show a distinct pattern.g. If a regressor that has nonconstant variance is (incorrectly) omitted from a model, the (OLS) residuals will be heteroscedastic.
According to Statute of Fraud, the agreement must be in writing to be within the statute and enforceable. The oral contracts are usually enforceable but the transfer of land needs to be in writing to be enforceable according to law of Statute of Fraud. If the contract is in writing it would be adequate to be enforceable. While the contract with bank must have some written form which will make it enforceable contract by the finance bank.
<span>When you gave your friend a fifty-dollar bill for an iPod, you used money as a <u>medium of exchange. </u><u />This is because you exchanged your money for an iPod. </span>
<span>This is an example of a strategic alliance of joint venture or business partnering. Joint venturing when trying to move into a new market can be a great idea for a business because they can use the distribution and established markets that the current business already has to move their own products.</span>
