1
2
Introduction
Established in 1903, Public Service Electric and Gas (PSE&G) is New Jersey's largest
provider of electric and gas service serving 2.2 million electric customers and 1.8 million gas
customers or nearly three out of every four people in the
Final Review KEY
Disclaimer: I tried to put important topics and concepts that I thought you should
go over again before the final. Anything we covered in class, on homework,
classwork, or that was in exams or checkpoint quizzes can still be fair game on
MAT 120 DEPARTMENTAL FINAL EXAMINATION - REVIEW
Fundamental Notions
Ch 1
1. The following grouped frequency table shows the annual amount of snowfall (in
inches) in NYC for the past 135 winter seasons, staring from winter 1869-70.
X
0-9.9
10-19.9
20-29.9
MEASURES OF ASSOCIATION FOR
CONTINUOUS VARIABLES:
PEARSONS CORRELATION
COEFFICIENT (r)
STA 250
CORRELATION
Correlation is used to measure the degree
of association between two continuous
variables
Formal name Pearsons Correlation
Coefficient (r)
ASSUMPT
Glossary of Statistical Terms / Concepts
BASICS
Statistics: set of mathematical procedures for organizing, summarizing and interpreting
information
Population: set of all individuals of interest of study
Sample: subset of individuals from population, inte
_
37
35
35
3O
25
l7
16
72
' 68
67
67
68
70
66
SCORES
165
151
160
160
146
160
133
SUMMATION NOTATION
STATISTICAL NOTATION
The measurements obtained in research studies provide the data for statistical analysis.
Most of the statistical analyses will use t
Variability
I.
Variability: a quantitative measure of the degree to which scores in a distribution are
spread out or clustered together.
II.
Range
a. Distance between largest score & smallest score in the distribution
i. Upper real limit of largest score
Central Tendency
I.
Central tendency refers to statistical measures to determine a single score that defines
the average or typical case of a distribution; average or typical case in a group.
II.
Measures of central tendency allow you to more easily compa
Frequency Distributions
I.
Frequency distributions are the most common way to organize data after collection.
II.
Frequency distributions are an organized tabulation of the number of individual
scores located in each category of the scale of measurement.
Pearsons Correlation (Pearsons r)
Formula:
= SUM of x scores (add up all x cores).
= SUM of y scores (add up all y scores).
= SUM of x times y (multiply each set of x and y scores and then add up all the results).
= SUN of (square each x scores and then a
SHARON LAWNER WEINBERG
SARAH KNAPP ABRAMOWITZ
Examining Univariate
Distributions
Chapter 2
Statistic
Usin
s
g
SPSS
An Integrative Approach
SECOND EDITION
Overview
Counting the occurrence of data values
Nominal and ordinal (with a limited # of categories
Bi-variate Correlation
Correlation is a statistical technique that is used to measure and describe a
relationship between two ratio-level variables. Usually the two variables
are simply observed as they exist there is no attempt to manipulate or
control t
CASE 6
Bipolar Disorder
Cd? fwagf 4/! ym[ fa [cjj
gavx p; W722: QMR udl) JCgmg/t
2222222 , 2:2 :2 222221522; The mean age of onset
for bipolar l disorder is
approximately l8 years
(APA, 20l3).
80
CASE 6
Gina, an only child, was raised in a prosperous
Darnell Salley
Math 204-03
Homework #3
1) Determine whether each argument is valid or invalid. Give reasons for your answers.
PvQ
Q .
P
PQ
P .
Q
2) Let P(x) denote the statement x is taking a math course. The domain of discourse is the
set of all students
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1. 16FL-MA115-44 - Quant
Name :
Score :
Circle - Circumference
Find the circumference of each circle. Round the answer to tenth decimal place. ( use =3.14 )
2)
1)
3)
48
61 cm
ft
in
28
Circumference =
Circumference =
5)
10
0 in
Circumference =
6)
36 cm
4)
Circumference =
Circumfer
Answer Key
1. p is approximately normal with p 0.07 , p 0.02 . b) P( p 8%) 0.3085 .
2. .
a) P( X 60) 0.1403 .
b) P(60 X 66) 0.5512 .
c) x 66.66.
d) x 65.06
e) x 67.30.
3. t0 1.95 and rejection region is (,1.304] . Thus, reject H 0 .
4. P-value 11.31%, but