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Unformatted text preview: CHE 320: Roadmap
Probability v Theory for
Statistics Random Variables – Discrete &
Continuous
v Probability Distributions
vPoint Estimation
v Confidence
Intervals
v Application
of Statistics Hypothesis Testing v ? v ? v 9/19/11 School of Chemical 11 Hypothesis
 A statement regarding two or more
variables
The mean age of CHE 320 students
is 20 years
vThe average outlet temperature of
the coolant from the airconditioner is
300K
v Court room trial: The accused is
not guilty
v 9/19/11 School of Chemical Statistica
l Nonstatistical 22 Example I – Gambling
Party!
You suspect that
one of your
guests is using a
loaded dice. ?
I. II. Getting rid of the guest when
he/she’s actually playing fairly
Letting him/her play when the
dice are in fact loaded 9/19/11 School of Chemical 33 Example II – Exam II
100 True or False
questions
1. T
Cutoff score for passing
the exam:
2. F
Pas
Fa
3. T
s
il
4. T
…
…
99. F
100. T 9/19/11 0 I. II. 50 ? 100 Poor student guessing 50+
correct
Good student not knowing a
section which, by chance, was
heavily stressed in the exam School of Chemical 44 Example III – Drug Test
Formula
innovation Drug
manufacturing Bioass
ay 100 rats injected with
drug
ØK of them die
Toxi
If K = 92, kill the
drug
c
If K = 3, pass
Safe
it
If K =
Ø 15, ?
9/19/11 School of Chemical 55 Hypothesis Testing
1. Identify parameter of
interest and state Null
Hypothesis (H0) 5
.4
. 2. 3
. 2
. 3. 1
. Alternative Hypothesis
(H1)
Specify level of
significance / risk (α)
or acceptance region 4. 5. 9/19/11 Data test statistic
Conclusions School of Chemical 66 ...
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This note was uploaded on 09/19/2011 for the course CHE 320 taught by Professor Harris during the Spring '10 term at Purdue.
 Spring '10
 Harris

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