Someone i don't understand any of this
(1) the standard deviation for a set of data is 9.5. the mean is 205. what is the margin of error?
(2)the standard deviation of a population is 1.9.
what is the margin of error?
(3) the results of a survey indicate that the true proportion of households who want a park in their neighborhood is likely in the interval (0.52, 0.8) .
what is the point estimate of the proportion of households who want a park in their neighborhood?
(4) in a sample of 200 bottles at a factory, 38 had major defects. the sampling method had a margin of error of 0.02.
what is the interval estimate for the proportion that would have defects in the form (lower limit, upper limit) ?

step-by-step explanation:

we are given a graph for system of inequalities.

in order to write the system of inequalities for the given graph, we need to find the inequality for each of the line separately.

let us find the slope of dotted line first.

taking two coordinates on the graph.

let us say (0,0) and (3,1).

let us find the slope of the line now.

slope of the dotted line would be =.

y-intercept of dotted line is y=0 only.

plugging slope m= and b=0 in slope-intercept form y=mx+b, we get

.

the line is shaded up of that dotted line.

therefore, for shading up we would take greater than inequality symbol > .

and because it's a dotted line we would take only > symbol in place of = sign in above equation of line.

therefore, inequality for dotted line would be

let us take two points (3,1) and (0,4) on the solid line.

slope of the solid line would be =.

for the solid line we have y-intercept b= 4.

plugging slope m= -1 and b=4 in slope-intercept form y=mx+b, we get

y = -1x + 4.

the line is shaded down of that solid line.

therefore, for shading down we would take less than inequality symbol < .

and because it's a solid line we would take ≤ symbol in place of = sign in above equation of line.

therefore, inequality for solid line would be

no because after the troops were pulled many blacks were killed by hangings lynchings and other cruel ways which in a way interrupted the reconstruction of the south and differed from the way abraham lincoln had an idea of reconstruction

step-by-step explanation:

yes.. it's proven to be 36.