Una encuesta a 36 propietarios de iPhone seleccionados al azar mostró que el precio de compra tiene una media de 650 dólares, con una desviación estándar muestral de 24 dólares. Se puede afirmar que el intervalo de confianza de 95% de la media es:

l.ln.lln.k.nkl

step-by-step explanation:

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3

-2 is the right

13664

step-by-step explanation:

=cross multiply

=100 x = 13664