A random sample of 65 light bulbs had a mean life of Xbar = 1535 hours. Construct a 95% confidence interval for the mean life, μ, of all light bulbs of this type. Assume σ = 77 hours.

A) 1510 hr < μ < 1560 hr

B) 1516 hr < μ < 1554 hr

C) 1519 hr < μ < 1551 hr

D) 1521 hr < μ < 1549 hr

E) 1514 hr < μ < 1556 hr

45

step-by-step explanation:

a

step-by-step explanation:

rurbrbrjrnrbjr

i believe that the slope of the line is -5

step-by-step explanation:

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.