BST 322 Week Two Slides
Revised: Aug. 6, 2016
Julie Ensign, MBA, M.Ed.
Deadlines
Wednesdays (no change)
Aug 10 is the Week One Deadline
Aug 17 is the Week Two Deadline
Week One Grades (preliminary)
The grades you have seen so far are just
meant as (ve
Week 3 Assignment
1.
Using StatCrunch, calculate the chi-square statistic and degrees of freedom for the
following set of data for 300 people:
Had flu shot
Didnt have flu shot
Total
Group A
20
80
100
Group B
30
70
100
Group C
32
68
100
Total
82
218
300
Is
Week 4
Correlation and
Simple Regression
Correlation Redux
Pearsons r
Ho: there is no relationship between two
variables
Ho: = 0.00
H1: there is a relationship between two
variables
H1: 0.00
Pearsons r Assumptions
IV and DV are measured on approxima
Suggestions for Week One Discussion Questions, BST 322 June 2016
Class, I will grade the discussion questions soon. Here are some suggestions for points to address as
you answer the three discussion questions. Why are we doing these questions? How should
JUNE 2016
BST 322 Introduction to Biomedical Statistics
Version: July 31, 2016
Online Format
Instructor: Julie Ensign, M.Ed., MBA
julie.ensign@natuniv.edu
Teaching Assistant:
Brooks Ensign, MBA
bensign@nu.edu
858-722-9012
BST 322 provides an introduction
BST 322 Week One Slides
Revised Aug 4, 2016
Julie Ensign, M.B.A., M.Ed.
Welcome! Instructors intro
Julie Ensign,
M.B.A., M.Ed.
I look forward to
helping you with
this class!
Blackboard
Watch this video! Making the transition from
eCollege to Blackboard A
Carlos McEntire
Bio-205
Assignment Antimicrobial Hunt
Name of Product: Body Essence Tea Tree Oil Ultra-Moisturizing Body
Wash
Store: Bed, Bath & Beyond & Bath & Body Works
Intended Use: Soap & Body Scrub w/ Moisturizer
Antimicrobial Ingredient: Terpinen-4
Week 4 Assignment
1.
For each correlation coefficient below, calculate what proportion of variance is shared by the two
correlated variables:
a.
b.
c.
d.
2.
For each coefficient of determination below, calculate the value of the correlation coefficient:
a
Week 2 Discussion
Are a certain sampled population of women in a poor urban setting as optimistic as women
nationally?
1.
State the null and alternative hypothesis.
Null Hypothesis- Women in a poor urban setting are as optimistic as woman
nationally.
Al
Week 4 Discussion 2
Given the data presented in Discussion Question 1 for this week, determine the cholesterol level of
someone who drank two and a half cups of coffee a day. To get the answer, plot a regression line
in StatCrunch and post your answers fr
WK3 D2
We want to know whether boys or girls get into trouble more
often in school. Below is the table documenting the percentage of
boys and girls who got into trouble in school:
Got in Trouble No Trouble Total
Boys
46
71
117
Girls
37
83
120
Total
83
154
Week 1 Assignment
1. a.constant
b. variable
c. variable
d. constant
2. a. IV. Age
DV. psychological adjustment
b. IV. Handicapped/ nonhandicapped children
DV. Health concepts
c. IV. Patients
DV. lower pain ratings
d. IV. State
DV. Weight
e. IV. Type of he
Wk 3 D 1
Now that we are more familiar with StatCrunch and making cross-tabulation tables,
discuss how the textbook author (Dr. Polit) created Figure 8.2 (the cross tabulation
table on p. 174). Can you get the data into StatCrunch and perform the Chi-Squa
Week 2 assignement
1.
3/36 or 8.333
3/36x3/36x3/36= 27/46656=3/5184
B will yield a more accurate estimate of its population mean. Because Population B is greater
than Population A the SEM will be smaller.
2.
3.
95% confidence interval results:
Me
an
Samp
Week 4 Discussion 1
1) What is the correlation coefficient r and what does it mean in this case?
Correlation Coefficient -0.72796194
This means as the Caffeine levels go up cholesterol levels go down.
2) What is the coefficient of determination and what
Independent Project
1) Frequency distribution of a variable and bar graph of the same variable.
Type of variable: Education
Frequency table results for education:
Education
Frequency
AA Degree
27
BA Degree
5
Diploma or GED
482
No Diploma
458
Relative Fre
Week 2 Discussion 2
1.
State the null and alternative hypothesis.
Null Hypothesis- In a sample of 24 patients with face shingles there
is no difference in pain ratings with regards to treatments of rest vs
acupuncture.
Alternative Hypothesis- In a sampl
Independent Project (20 points)
Name: _
DIRECTIONS: This is an Independent Project and as such is to be done
individually by each student. Using StatCrunch and the appropriate variable(s) of
your choice among those in the data set supplied in Doc Sharing,
PRACTICE EXAMPLES SELECTING THE APPROPRIATE
TEST
1. Independent variable: infertility treatment A versus infertility
treatment B versus control condition; dependent variable: did versus
did not become pregnant
ANS #1: Chi-Square Test for Independence [2]
Week 4
p-values
The calculated probability values
corresponding to a particular test statistic
given some set of circumstances
Sample size
Degrees of freedom
Etc
Calculated for us by SPSS
P<0.05 generally considered significant
Corresponds to alpha
Week 3
Statistical
Inferences:
t-tests
t-Tests
Used to determine if the sample
means of two groups differ
Uses a calculated t which is
then compared to a table value
If calculated t is greater than
table value, Ho is rejected
AKA Students t-Test
Hypothese
Week 2
Probability
Probability
The basics:
What is the likelihood of a given event
Given 2 fair coins
What are the possible outcomes of
flipping both?
Heads,
Heads,
Tails,
Tails,
then
then
then
then
heads
tails
heads,
tails
For any of the above, the pr
BST322 HOMEWORK #4
Name: _
Directions: (a) Enter all your answers into this Word document and submit the
entire document. IMPORTANT: The name of your Word document MUST begin
with your LAST NAME. (b) When you use Statcrunch to calculate an answer, copy
an
BST322 HOMEWORK #4
Name: _Jenny Chuang_
Directions: (a) Enter all your answers into this Word document and submit the
entire document. IMPORTANT: The name of your Word document MUST begin
with your LAST NAME. (b) When you use Statcrunch to calculate an an
BST322: HOMEWORK #3
Name: Jenny Chuang
Directions: (a) Enter all your answers into this Word document and submit the
entire document. IMPORTANT: The name of your Word document MUST begin
with your LAST NAME. (b) When you use Statcrunch to calculate an ans
BST322 HOMEWORK #2
Name: _Jenny Chuang_
Directions: (a) Enter all your answers into this Word document and submit the
entire document. IMPORTANT: The name of your Word document MUST begin
with your LAST NAME. (b) When you use Statcrunch to calculate an an