###### Asked in StatisticsEngineeringMedical Terminology

Statistics

Engineering

Medical Terminology

# What is the fifth and 9fifth percentiles?

## Answer

###### Wiki User

###### July 16, 2015 2:31PM

The 50th percentile is average. The 5th is way below and the 95th is way above.

The 5th and 95th percentiles are the lines that set of the "**edges of the curve**" in a distribution over a bell curve. If you draw the bell, and mark the 5th and 95th percentile spots, those marks separate the bulk of the curve from its edges. The 5th percentile sets off the bottom edge and the 95th percentile sets off the top edge of the curve.

## Related Questions

###### Asked in Math and Arithmetic, Statistics, Probability

### What is the fifth and 9fifth percentiles of a mean temperature of 98.2 and the standard deviation is 0.62?

The 5th percentile of a standard normal distribution is -1.645
(from the normal probability table).
z = (x - μ) / σ
-1.645 = (x-98.2) / .62
(0.62)(-1.645) = x-98.2
-1.0199 = x-98.2
x = 98.2-1.0199 = 97.1801
The 5th percentile is 97.18
The 95th percentile of a standard normal distribution is 1.645
(from the normal probability table).
z = (x - μ) / σ
1.645 = (x-98.2) / .62
(0.62)(1.645) = x-98.2
1.0199 = x-98.2
x = 98.2+1.0199 = 99.2199
The 95th percentile is 99.22

###### Asked in Books and Literature

### Is the book War and Peace inappropriate for 5th grade?

Yes. The book "War and Peace" is inappropriate for a fifth
grader from the perspective of it being a difficult read, both in
terms of complex language and length. From a purely content-based
perspective, it may also be challenging for a fifth grader to
understand the events and circumstances in which the main
characters find themselves. However, a fifth grader may wish to try
reading "War and Peace" if they are in the upper percentiles of
reading ability and have strong reading stamina, but this would be
one fifth grader in tens of thousands.

###### Asked in College Applications and Entrance Requirements, Indiana, SAT

### Sat average scores?

"For the new 2016 SAT, the College Board calculated SAT score
percentiles for two groups: all 11th and 12th grade students
(Nationally Representative Sample Percentiles) and college-bound
students who typically take the SAT for the last time as 11th- or
12th-graders (SAT User Percentiles). For the Nationally
Representative Sample, the national average SAT score was:
Evidence-Based Reading and Writing: 510
Math: 510
Total: 1020
For college-bound SAT users, the SAT national average score
was:
Evidence-Based Reading and Writing: 543
Math:

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