Question 2: Statistical Significance – 6 points For this question, use the trainData. In model1, which regression coefficients are significant at the 95% confidence level? Are these the exact same regression coefficients that are significant at the 90% confidence level? (2 points) Build a new model using only the variables whose coefficients were found to be statistically significant at the 95% confidence level. Call it model2. Display the model summary. (2 points) Perform a Partial F-test to compare this new model with the full model (model1) and interpret it at the 95% confidence level. Which one would you prefer? Is it good practice to select variables based on the statistical significance of individual coefficients? Why or why not? (2 points)

_____________ refers to the reliable effects of schedules when in place for a relatively long period of time. 

Manipulating ______________________ was one way to meet the characteristic of “focus on reinforcement first” designed to influence the effectiveness of a punisher.  

______________ has been used to account for reduced effectiveness of punishers when introduced gradually.  

Gradually changing punisher _________________ has been shown to weaken the effects of punishment relative to abrupt introduction. 

BONUS (up to 3 points): Explain the differences between osteoporosis and osteomalacia.

A bond that has a “AAA” rating would have a __[x]____ coupon rate since its risk of default is __[y]____. (*2*) Hint: Remember the basic principle about risk and return.

BONUS #2: The coupon rate is best described as ________________. (1) 

What type of information is collected for an independent analysis?

What is a phonetic inventory and how is one obtained?