Match each key characteristic of a distribution with the concept it characterizes.
1. characterizes the spread of a group. sample mean
2. characterizes the average value of a group. z-values
3. characterizes the average value of a subgroup sample standard deviation
4. characterizes the distribution of a subgroup. population mean
5.characterizes percentages of a normal distribution. population standard deviation

answer: it's d

step-by-step explanation:

just pick what you think i need more time let me know if this

step-by-step explanation:

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3

b

step-by-step explanation:

multiply terms on numerator/ denominator by (x - 1)

= ← distribute numerator/ denominator

= ← simplify

=

= → b