Question

How do you find the X value that corresponds to a given percentile of the normal distribution?

Answer #1

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Suppose X has a normal distribution with mean 115 and variance
25. Find the 67th percentile of the distribution of X.

Suppose X has a normal distribution with mean 120 and variance
36. Find the 67th percentile of the distribution of X.

A random variable X has this normal distribution: X ~ N(26,
12).
Find the 60th percentile.

Problem 1:
(a) Find the critical value z α/2 of the standard Normal
distribution that corresponds to the confidence level of 100(1 −
α)% = 88%
(b) Find the critical value t α/2 of the Student distribution
that corresponds to the confidence level of 100(1 − α)% = 95% and
12 observations.

Suppose X has a normal distribution with mean 115 and variance
25. Find the 67th percentile of the distribution of X.
Group of answer choices
117.2
136
134.8
131.425

Suppose X has a normal distribution with mean 115 and variance
25. Find the 67th percentile of the distribution of X.
A. 134.8
B. 117.2
C.136
D.131.425

use
the standard normla table to find the z-score thag corresponds to
tbe given percentile . if the area is not in the table use the
entry closest to the area . if the area is halfway between two
entries use the z-score halfway between the corresponding z-scores
1. the z-score that corresponds to P80 is ??
(round to two decimal places as needed)
find the z -score that has 97.5% of the distribution's area to
its left
1. the...

X follows a normal distribution with mean=10 and sd=2,
find
a. the 30th percentile
b. P(9<X<12)

How do I find the raw score on the SAT that corresponds to each
of the following percentiles?
40th, 80th, 65th and 95th
Here is the original question"Find the raw score on the SAT that
corresponds to each of the following percentiles" I found this
equation but im not sure if its correct or how to use it, X = μ +
zσ Thanks!

Given X has a normal distribution, could you find a probability
for x bar if n was only 10, why or why not?

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