Residential Property Management
Community Manager
PPA
Residential Property Management
Assistant Manager, Leasing
HVA
Online Technical
Account Manager Massage Therapy
Clinical Therapist Telecom Products
Sales Executive ASP Support
Client Services Inquiry Center
CRM Specialist Call Center
Design Engineer Help Desk
Desktop Support Call Center
Client Communications
Hospitality Reservations Manager Sales
Special Orders Retail
Commercial Ast Manager
Clinical Massage Therapy
Massage Therapy
Being a Male Therapist
Ethics
Many occupational hazards of adult life will be greatly alleviated by
massage:

aching back and shoulder after a long office stint

exhaustion or overstrained muscles from physical labor or
excessive exercise

circulatory problems from too little exercise by sedentary
workers.
Customer Management Tip
Customer Centricity
Creating Customer Loyalty
End user Training
Coaching Staff
Creating Value

Chapter 19  Statistics
Percentile Rank A percentage that describes
your rank among those also being evaluated.
I.e. if your percentile rank on a test is 90,
then your score is higher than 90% of the
class. It is impossible to get 100% percentile
rank because you cannot get higher than everyone
in the class, including yourself.
 Mean The average score. Add all the
numbers up and divide by number of terms.
The mean of {2,2,3,10,98} is 23.
 Median The middle point of all the
terms such that half is above the number and
half is below the number (50th percentile).
Arrange the number from highest to lowest or
vice versa and find the number in the
middle. The median of {2,2,3,10,96} is 3.
 Mole The number that occurs the most.
Count to see which number appears the most.
The mode of the {2,2,3,10,98} is 2.
 Range The range of the scores is the
difference between the highest number and
the lowest number. The range of GPA score
is from 0.0 to 4.0.
 Standard Deviation A measurement of
how far scores differ/deviate from the mean.
The standard deviation of {5,6,5,6,6,7,5,4}
is very low because terms hardly deviate
from the mean of 5.5. Whereas, the standard
deviation of {5,10,8,18,6,5,7,22} is high.
 Find the Standard Deviation of
{2,3,3,4}
 Find the
mean.
(2+3+3+4)/4 = 3
 Subtract the mean from each term and
square it. (23)²=1, (33)²=0,
(33)²=0, (43)²=1
 Find the average of the deviations
from the mean. (1+0+0+1)/4 = 0.5
 Square root the average and thats
the standard deviation (0.5)^1/2 =
0.7071
 Normally this number should be
rounded to the same decimal place as the
data. But 0.7071 is shown for better
understanding. 0.7071 ! 1
 Normal curve or more commonly known as
the bell curve is a distribution graph that
dictates 68% of the scores should circa the
mean. More specifically, 68% of the scores
should fall within 1 standard deviation and
95% should fall within 2 standard deviations
from the mean.
 Scatterplot A graphical representation
of data by usage of dots. The degree of
cluster or formation of a slope can dictate
the correlation between the two variables.
 Correlation The relationship between 2
events. I.e. Traffic accidents increase with
increasing temperatures; businesses drop as
Christmas ends.
Correlation Coefficient A
proportional number that measures correlation
how strongly two events vary together.
 Positive Correlation The two events
increase and/or decrease together. For
example, increasing study time positively
correlates with increasing grades or
decreased food consumption positively
correlates with decreased excitability.
Positive correlation coefficients are
positive numbers ranging from 0.00 (no
correlation) to 1.00 (perfect correlation).
In a scatterplot graph, a positive
correlation exists if a positive slope is
seen.
 Negative Correlation One event
increases and the other decreases or vice
versa. For example, decreasing number of
hours of sleep negatively correlates with
increases traffic accidents or increasing
alcohol consumption decreases alertness.
Negative correlation coefficients are
negative numbers ranging from 1.00 (perfect
correlation) to 0.00 (no correlation). In a
scatterplot, negative a correlation exists
if a negative slope is seen. * Be sure to
remember that CORRELATIONS DO NOT
NECESSARILY MEAN CAUSATION. If car
accidents increase with increasing
temperatures, it does not necessarily mean
that hot temperatures cause more traffic
accidents!!
 Be aware of ILLUSORY CORRELATION
seeing relationships between something when
there is none. If you believe that
blackcolored dogs are more aggressive than
whitecolored dogs, then you will be more
likely to notice and recall events where
blackcolored dogs show aggressiveness to
confirm your belief (also know as self
serving bias).
 Regression toward the mean Tendency
for extreme values to go back (regress) to
the average value (mean). I.e. If you
normally get 80% on your tests and suddenly
you got an extreme (unusual) score of 50%,
then on your next test you are likely to get
around 80% again.
 Statistical Significance A measure of
how likely an event is due to chance alone.
I.e. If average marks concerning two classes
are statistically significant, then the
marks are actually different, not due to
random chance or sampling errors.
Statistical significance is usually
determined by mathematical analysis of the
samples.
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Bibliography
Myers, David G., Psychology Fifth Edition.
Worth Publishers, Inc. New York, NY ©1998
