In a recent study on world happiness, participants were asked were to evaluate their current lives on a scale from 0-10,where o represents the worst possible life and 10 represents the best possible life. Then mean response was 5.4 with a standard deviation of 2.3 A. what response represents the 86TH Percentile?
B. what response represents the 56 Percentile?
c. what response represents the first quartile?

Step-by-step explanation:

Let's assume that we can apply the central limit thereom

the z score that associates with .86 is about 1.08

so

1.08=(x-5.4)/2.3

x= 7.884

The zscore that associates with .56 is .15

.15=(x-5.4)/2.3

x=5.745

The first quartile is equal to the 25th percentile

the 25th percentile has a z score is closest to -.67

-.67=(x-5.4)/2.3

x=3.859

.19875994384

step-by-step explanation:

1699/ 8548

8.75

how-to:

first, we need to find what we have to work with.

since i know that we have 7 (years) and 0.8 (inches), we can use these to solve and find the equation!

secondly, what you want to do, is see that we need to know how much growth out of the 0.8 inches he got in only 1 year, instead of 7 years.

let's try to divide.

7 ÷ 0.8 = 8.75