A simple random sample of 30 widgets is drawn from a manufacturing lot of 200 widgets. The widgets in the sample are run until they fail. 8 of the widgets in the sample last more than 3,000 hours. An unbiased estimate of the fraction of widgets in the manufacturing lot that will last more than 3,000 hours is .
The finite population correction for the standard error of the sample percentage is
The largest the standard error of the sample percentage could be is
The bootstrap estimate of the standard error of the sample percentage is
The bootstrap estimate of the standard error of the sample percentage is (unbiased OR biased)

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step-by-step explanation:

the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

the root or roots of a polynomial are the values of the variable that makes the polynomial equal to 0. we can find the roots of a polynomial making the expression equal to 0 and then, isolating the variable (it it has just one variable).

for example, given the following polynomial:

the root or zero of the polynomial, can be found by making the expression equal to 0, and then, isolating the variable, so, finding the root we have:

therefore, we have that the root of the polynomial is equal to 2.

we must remember that the number of roots that a polynomial can have, will depend on the degree of the polynomial, a first degree polynomial have will have one single root, a second degree polynomial (quadratic expression) may have two roots and so.

hence the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

have a nice day!

moderators are

any of them that add up to 180 degrees.