18 Find each item listed below for the data provided.
Test Scores: 50, 69, 70, 75, 75, 90, 85, 80, 70, 60, 100, 95, 90, 80, 85,50
(all answers should be rounded to the nearest tenth)
Mean:
Median:
Range:
IQR:

Mean: 78.2

Median: 80

Range: 50

IQR: 20

Calculator for mean, median, mode, range, & IQR: go to https://www.calculatorsoup.com/calculators/statistics/mean-median-mode.php

If you go to that link it will calculate that stuff, or if you just look up mean median and mode calculator

Step-by-step explanation:

I really hope this helps!!!

Have a fantastic day!!

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,