false
Question 1
0 out of 1 points
Why is chi-square used so frequently in social work research?
Selected
Answer:
Answers:
a. it is well suited to social work because it requires only
nominal level data
a. it is well suited to social work because it requi
Exam 1 Concept Guide
Concept Checklist:
Be able to compare and contrast: descriptive statistics vs. inferential statistics, population vs.
sample,
observational studies vs. designed experiments, qualitative variable vs. quantitative variable,
discrete
vs
Question 1 5 out of5 points
Monthly,r cell phone bill is assumed to follow a normal distribution with a. mean of $4? and standard
deviation $8. What is the probability that a randornlj,J selected phone bill will be more than $67?
Selected Answer: 9 0_ 0.0
Chi-Square Goodness-of-Fit Test
Assumptions
1. All expected frequencies are 1 or greater
2. At most 20% of the expected frequencies are less than 5.
3. Simple random sample
STEP 1:
The null and alternative hypotheses are
HO : The variable has the specifie
false
Question 1
1 out of 1 points
You work at an alcohol and substance abuse treatment center for
youth. The treatment center just received funding for a new program.
One of the goals of the intervention is to improve youths' knowledge
and understanding
false
Question 1
1 out of 1 points
Raw data are data that have been statistically manipulated: for
example, you derived that 92% of the class have math anxiety.
Selected
Answer:
Answers:
Fals
e
True
Fals
e
Question 2
1 out of 1 points
A researcher is stud
false
Question 1
2 out of 2 points (Extra Credit)
For Extra Credit. Calculate the mean, variance, and standard
deviation for the following distribution: 13, 18, 23, 30, 49, 54
Selected
Answer:
a.
Mean = 31.17 Std. Deviation (SD) = 16.80
Variance = 282.17
false
Question 1
1 out of 1 points
Based on mean, SD, and histogram the data's distribution is
_. (click on link)
Quiz Module5_histogram.doc
Selected
Answer:
c.
positively
skewed
Answers:
a.
skewed
b.
negatively
skewed
c.
positively
skewed
d.
normal
Quest
Types of Statistics:
*sample is part of a population observed or tested; population is group of individuals under study
Sampling Procedures
-Simple Random Sampling (SRS): Most commonly used. Use of part of the population (a sample) to
examine the entire p
Courtney Doerfler
Group Problems - Chapters 2 & 3
Using data from Problem 3.187 pg. 139, do the following.
1. Using Statcrunch, construct the histogram. Does the histogram appear
to represent a symmetrical population distribution?
a. No, it is right skewe
Paired Data t-Test
Assumptions
1. Simple random paired samples
2. Normal differences or large sample
STEP 1:
The null hypothesis is
H O : 1 2 OR 1 2 0
The alternative hypotheses
H A : 1 2 OR 1 2 0
(Two tailed test)
H A : 1 2 OR 1 2 0
(One (right) tailed t
STP226 Review notes for Test #1, chapters1-3
1. Know new vocabulary and symbolic notation.
For example:
frequency, relative frequency, mean, median, quartiles, mode, interquartile range,
z-score or standard score, stem-and leaf diagram, box plot, statisti
STP 226 Review Test #2
1. Know new vocabulary and symbolic notation :
Probability (definition and rules)
Equally likely outcomes
Sample space, events, A & B, A or B, not A
Venn diagrams
Standardized version of normal variable, z-score: z = (x-)/
Z
2
Cailley Formichella
O*net vs. Kuder
EX Credit
The values I received on my O*net assessment were: Artistic 18, Enterprising 11,
Social 10, Conventional 5, Investigative 4, and Realistic 1. This surprises me because I
never really thought my artistic values
Chapter 2:
Organizing Data
STP 226: Elements of Statistics
2.1: Variables and Data
Variable
Height
Age
Number of siblings
Sex
Marital status
Blood Type
Qualitative Variable
Sex
Marital status
Blood Type
Quantitative Variable
Height
Age
Number of siblings
Chapter 1:
The Nature of Statistics
STP 226: Elements of Statistics
1.1: Statistics Basics
Descriptive Statistics
Descriptive statistics consists of methods for organizing and summarizing information.
Example 1:
Population & Sample
A population is the col
Exam 3 Concept Guide
Concept Checklist:
Be able to compare and contrast: parameter vs. statistic, x vs. , s vs. , standardized vs.
studentized, z-curve vs. t-curve, confidence level vs. significance level, point estimate vs.
confidence interval, null hyp
Exam 2 Concept Guide
Concept Checklist:
Be able to compare and contrast: parameter vs. statistic, population vs. sample, x vs. m
(sample mean vs. population mean), s vs. s (sample standard deviation vs. population
standard deviation), standardized vs. st
Final Review
Hypertonic/ hypotonic
Connective tissues
Basic structure of the bone
How skin can be affected
Types of hairs
Functions of the skin
Layers of the skin (what find in each layer of skin)
Layer of skin in order
Regions of the bone (function of ea