Answer:
C. can cause hypothesis tests to be unreliable
Explanation:
Omitted variables are those variables that, when left out of a statistical model, for example linear regression, affects the outcome of the model. It either ignores the impact of the omitted variable to the results or it may assign the effect of the omitted variable incorrectly to the effect of the included variable on the statisical model. This of courses results in the model depicting an upward bias or a downward bias. This is referred to as the Omitted Variable Bias (OVB).
Lets take an example. If you were to run multiple regressions to figure out the factors that affect the prices of houses in an area, you would include multiple variables that you deem significant. The variables you would include in the regression model would include the age of the house, the size of the house, the number of rooms and so on and so forth. However, lets assume that some of the houses are located near an industrial waste plant which negatively impact the price of the house. You forget to include thos proximity variable in your model which would likely make your model biased since the proximity to a waste plant would drastically impact the price of a house that is similar in all aspects with a house that is located further away.
Furthermore, the aren't any statistical models that would located omitted variables therefore, in the context of the question, omitted variables can cause hypothesis tests to be unreliable
Answer:
b) III.
Explanation:
Required Supplementary Information (RSI) of a state or local government includes the Management’s Discussion and Analysis (MD&A) section. Other than this, there is a separate section which includes the following:
- Schedules
- Statistical Data
- Budgetary Comparison Schedules & Other Information.
Required Supplementary Information includes Budgetary comparison schedules but does not includes remaining options given the question such as Individual fund statements and Combining statements.
Answer:
C.convenience, purchase
Explanation:
convenience, purchase will be filled in the blanks.
Since, service is online and users can buy and print postage and labels online, the U.S. Postal Service is offering the Convenience to the users. Now, it would be easier for the customers to buy and print postage stamps. This done during the purchase stage of the buyer experience cycle.