The number of children per household in the US is strongly skewed to the right with a mean of 3.1 children per household and a standard deviation of 1.2 children per household. A person studying demographics selects an SRS
of size n = 40 from the population of all households in the US and calculates the sample mean number of children per
household. What is the standard deviation of the sampling distribution of the sample mean?
Round to 2 decimal places.

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step-by-step explanation:

you need to give us more information since we can't answer

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.