1. Elena would like to know the average height of seventh graders in her school district. She measures
the heights of everyone in a random sample of 20 students. The mean height of Elena's sample is 61
inches, and the MAD (mean absolute deviation) is 2 inches.
Select all the true statements. Make your selections bold.
A.
The median height of the sample must be between 59 and 63 inches.
B. Another random sample of 20 students is likely to have a mean between 57 and 65 inches.
C.
The mean height of these 20 students is likely to be the same as the mean height of all
students in the district.
D.
The mean height of these 20 students is likely to be the same as the mean height of a second
random sample of 20 students.
E.
Elena would be more likely to get an accurate estimate of the mean height of the population
by sampling 40 people instead of sampling 20 people.

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

the answer is 11.2 (i know i’m late)

66.666666667%

step-by-step explanation:

divide 150 by 100

divide 100 by 1.5

there you go!

decreased by 33.333333334%