Consider the sample of n = 20 scores. Notice that they are listed in order from 2.5 to 12.0, but that some of the scores are obscured by ***. The mean, M, of these scores is 8.0.
2.5 *** 4.6 5.1 *** 6.0 *** 6.5 6.6 8.5
8.7 9.6 *** 9.9 10.0 10.3 10.5 *** 11.6 12.0
Suppose you are asked for the sample standard deviation of these scores. Since you don’t have all of them, you cannot calculate it.
1. Which of the following is the best estimate of the sample standard deviation?
O 9.5
O 0.5
O 6.4
O 2.7

step-by-step explanation:

10.50 + taxes which added up to 11.50

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

18.8cm hope i at all

step-by-step explanation: