Suppose a large population has mean m and standard deviation s, and a simple random sample of size n is taken. The sampling distribution of the sample mean has mean and variance respectively equal to a m/n and s2/n2. b m/n and s2/n. c m and s2/n2. d m and s/n. e m and s2/n.

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source:

good luck on ur quiz test or homework. have a good day : )

its a lot blury