Using the marital.csv correlation matrix from the paper Marital
Conflict Management Skills, Parenting Style, and Early-onset Conduct
Problems: Processes and Pathways by Carolyn Webster-Stratton and
Mary Hammond in the J. Child Psychology and Psychiatry Vol 40,
No. 6, pp. 917-927.

Do the following

1. Fit the path model shown in Figure 1 in the article and print it
out.

2. Record the path coefficients and their associated critical ratios
and p-values for the paths that were thrown out by the authors of
the paper.

3. Refit the model with the paths taken out (the paths the authors
took out) and print it

4.  Based on the model you have fit in 3. what is the indirect effect
of Marital Negative Conflict Management on Child conduct?  Using the
bootstrap procedure, what is the standard error of this indirect
effects?  Is it a statistically significant indirect effect?