explanation:
In an observational study, we measure or survey members of a sample without trying to affect them. In a controlled experiment, we assign people or things to groups and apply some treatment to one of the groups, while the other group does not receive the treatment
Answer:
The expected losses are $200 per year
Step-by-step explanation:
Expected payoff from flood insurance is:
income*probability of flood
$ 1000 * 0.20 = $ 200
But his insurance costs $400 per year, then he will loss: $ 400 - $ 200 = $200 per year.
Answer:
61°
Step-by-step explanation:
Angle extended to the circumference is half the angle at the centre
ADC = ½ ABC = ½ × 122 = 61