CLSSBB

CLSSBB practice questions, page 9 of 12, with answer review and explanations.

Question 41

Which statement(s) are incorrect for the Regression Analysis shown here? (Note: There are 2 correct answers).

  1. The air-fuel ratio explains most of the TurbineOutput variation
  2. The Regression explains over 98% of the process variation
  3. This Multiple Linear Regression has three statistically significant independent variables
  4. If the air-fuel ratio increases by 1, the TurbineOutput more than triples
  5. The SteamExitTemp explains the most variation of the TurbineOutput

Question 42

Which statement(s) are most correct for the Regression Analysis shown here?

  1. The Regression explains 50.8% of the process variation
  2. The air-fuel ratio explains most of the TurbineOutput variation
  3. This Simple Linear Regression explains 98+% of the process variation
  4. This Multiple Linear Regression has four statistically significant independent variables

Question 43

A valid mathematical Regression represents all of the characteristics shown except ___________________________.

  1. The residuals when plotted follow a Normal Distribution
  2. The sum of the residuals is zero
  3. All of the standardized residuals will be within ±3 Standard Deviations
  4. Most standardized residuals are within ±2 Standard Deviations

Question 44

When a Belt conducts a Linear Correlation Analysis and finds that as an X increases the Y also increase then he has proven a ______________ correlation.

  1. Negative
  2. Positive
  3. Monomial
  4. Single alignment

Question 45

A valid Multiple Linear Regression (MLR) is characterized by all of these except _______________________.

  1. It is an assumption that the X’s (inputs) are not correlated to each other
  2. The X’s (inputs) are assumed to be independent of each other
  3. MLR is conducted based on a deliberate form of experimentation
  4. The Residuals from MLR analysis have to be Normally Distributed