1. Explain the difference between statistical significance and whether an effect is substantively important.
2. Show the full equation to calculate the t-statistic
3. Multi-part question. All the rest of the questions in this assignment pertain to the below regression table. Standard errors are in parentheses.

The below regression table shows the results from a regression of neuroticism (a personality characteristic) on extraversion (another personality characteristic). It uses data from the Cowles data set in the carData package, if you're interested.

	neuroticism
(Intercept)	13.065 ***
	(0.431)
extraversion	-0.129 ***
	(0.033)
N	1421
R2	0.010
*** p < 0.001; ** p < 0.01; * p < 0.05.

• Looking at the stars in the table, we can reject the null that the coefficient on extraversion is 0 with

= 0.01

True or False

• Using a normal null distribution, what is the 95% confidence interval on the coefficient on extraversion?
• If the above regression object is stored as personality_reg, write the glht() R code that will test whether the coefficient is equal to -.18.