A population has 75 observations. One class interval has a frequency of 15 observations. The relative frequency in this category is:

The relative frequency in this category is 0.2

Step-by-step explanation:

The relative fraquency of a category is given by the number of observations in this category divided by the total number of observations.

In this question:

The category of interest has 15 observations.

In total, the population has 75 observations.

So the relative frequency is:

answer: kljdcdhjbdlchjad oac apoich a

step-by-step explanation:

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