(a) (4 points) Write down the four assumptions required to make inferences for a pop- ulation given a sample. (b) (4 points) Propose an unbiased estimator for the average annual income in the county. Show that it's unbiased. (c) (4 points) Find the variance of your proposed estimator. Detail how the variance changes as the sample size increases. Is this change a desirable feature

a is the right answer

(53.5 - 18.4) m.

step-by-step explanation:

after undergoing a displacement of 18.4m, the initial position was (53.5 - 18.4) m if an object has a final position of 53.5.

the transitive property of equality.

step-by-step explanation:

the correct answer is:

the transitive property of equality.

explanation:

we know that  ∠bcd is congruent to  ∠pbc. we also know that  ∠pbc is congruent to  ∠bad.

we can substitute  ∠bad for  ∠pbc in the first angle congruence statement to give us:

∠bcd is congruent to  ∠bad.

algebraically, the transitive property states if a=b and b=c, then a=c. it basically allows us to substitute equal values. since that is what we did, this is the transitive property.

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