3) How did insurance begin?*
2 points
It is a very old idea which started back
when sailing ships got destroyed or
lost their cargoes
It started in 1893 after the first car
accident
It started in 1725 after the great
London fire destroyed half the city
None of these

In a column proof the right column states your reasons

Which strategy is used by public health to reduce the incidence of food poisoning?

Stu and ambrose are working together on a study of whether diet is related to students' mental health. first, they randomly select 10 students from the student center and 10 students from the office of counseling and psychological services. then, they ask students to rate their diet in terms of healthiness on a scale of 1-100 before completing a 20-item mental health survey. a) name one of the constructs being studied b) how was the construct you named above operationally defined in this experiment? e) was the variable you described above their independent variable, their dependent variable, or a controlled variable? d) what is a confounding variable? what is a potential confound in this study?