The nurse is explaining the difference between descriptive statistics and inferential statistics to ...

The nurse is explaining the difference between descriptive statistics and inferential statistics to a group of student nurses. To illustrate descriptive statistics, what would the nurse use as an example?
 
  1. A positive correlation between breastfeeding and infant weight gain
  2. The infant mortality rate in the state of Oklahoma
  3. A causal relationship between the number of sexual partners and sexually transmitted infections
  4. The total number of spontaneous abortions in drug-abusing women as compared with non-drug-abusing women