Which describes the expected value: a. the sum over all outcomes of the value of the outcome b. the level of confidence that a sample mean accurately represents a population mean c. the population mean d. the interval around the sample mean that you expect to contain the population mean

bru

step-by-step explanation:

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.