In the 17th-18th century the ammount of slaves depleted, so this would be true
This type of quantitative research aims to examine the effects of a treatment dicotomic variable (values 0 or 1) on a certain dependent variable. In this case:
- the treatment variable: living together with the couple before marriage. It is dicotomic because it equals 1 when a couple lived together and 0 when one did not.
- the dependent variable: happiness during the marriage
The aim will be to assess whether there is or not a casual relationship among these two variables. In order to so, control and treatment groups should be observed. The treatment group would contain couples who experienced the treatment, hence (living together before marriage), while the control group would be composed by couples who did not undertake the treatment.
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soil conservation practices are tools the farmer can use to prevent soil degradation and build organic matter. These practices include: crop rotation, reduced tillage, mulching, cover cropping and cross-slope farming
Explanation:
