The following data consists of the scores in a statistics exam. what is the inter-quartile range of this data rounded to the nearest whole number? 80, 99, 77, 67, 93, 71, 76, 86, 79, 71

IQ R = 15  

Step-by-step explanation:

given numbers,

80, 99, 77, 67, 93, 71, 76, 86, 79, 71

arranging numbers in ascending order

67, 71, 71, 76, 77    :   79, 80, 86, 93, 99

    lower half         :        upper half

inter quartile range  = IQR = Q₂ - Q₁

Q₂ = median of the upper half

     =  86

Q₁ = median of the lower half

    = 71

so,

IQ R = Q₂ - Q₁

        = 86 - 71

IQ R = 15  

b

step-by-step explanation:

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl