Explain whether the following relationships are positive correlations or negative correlations.

a. People with larger families tend to have better support systems in a crisis.

b. Individuals who brush their teeth more usually have fewer cavities.

c. Factory workers who spend more time doing a job usually make fewer errors.

d. People with higher salaries usually take more expensive vacations.

e. Children who watch TV more tend to have lower grades in school.

f. Societies where women have more human rights tend to have lower birthrates.

g. Children who receive more vaccinations have fewer serious illnesses.

h. Romantic couples who spend more time together say that their relationship is stronger.

i. People who consume more calories tend to have greater body weights.

j. Musicians who practice their instrument are usually better performers.