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
Us
Week 4 Assignment
1.
For each correlation coefficient below, calculate what proportion of variance is shared by the two
correlated variables:
a.
r = 0.25
b.
r = 0.33
c.
r = 0.90
d.
r = 0.14
Hint: proportion of variance shared by the two correlated variabl
Question 1
1 out of 1 points
The Central Limit Theorem states:
Selected
Answer:
Correct
Answer:
The mean of a sampling distribution of means is equal to
the population mean.
The mean of a sampling distribution of means is equal to
the population mean.
Qu
Week 2
Discussion 2
Two sample T hypothesis test:
1 : Mean of Rest (Ali)
2 : Mean of Acupuncture
1 - 2 : Difference between two means
H0 : 1 - 2 = 0
HA : 1 - 2 0
(with pooled variances)
Hypothesis test results:
DifferenceSample Diff. Std. Err. DF T-Stat P
Attempt
Score
20 out of 20
points
false
Question 1
1 out of 1 points
Chi square test for independence compares observed frequencies with:
Selected
Answer:
Correct
Answer:
Expected
frequencies
Expected
frequencies
Question 2
1 out of 1 points
The degrees o
BST 322 W 4 D1
Q1 Correlation between coffee and cholesterol
A study from a Colombian research center is about to publish a pilot study regarding a new
coffee plant that they believe can reduce total cholesterol in humans. They gave increasing doses
(cups
false
Question 1
1 out of 1 points
The variable "religion" is an example of what level of data?
Selected
Answer:
Correct
Answer:
Nomin
al
Nomin
al
Question 2
1 out of 1 points
Correlation coefficient tests allow you to determine if a cause and effect
rela
BST 322 W4D1
Q2 Regression- What is the predicted cholesterol level?
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 regre
BST322 W3 D2
For this second question - let's try to make a crosstabulation table for a problem we don't have in
the textbook.
We want to know whether boys or girls get into trouble more often in school. Below is the table
documenting the percentage of bo
Week 2
Discussion Question 1
One sample T hypothesis test:
: Mean of variable
H0 : = 50
HA : 50
Hypothesis test results:
Variable
optimism score (Ali)
Sample Mean
Std. Err.
DF
T-Stat
P-value
44.534 0.33089021 999 -16.519074 <0.0001
1. State the null and
BST 322 Week 3 D1
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
Discussion Question 2
Worknow
Poverty
Below poverty
% within poverty
% within worknow
% within total
Above poverty
% within poverty
% within worknow
% within total
Total
% within poverty
% within worknow
% within total
No
446
66.87%
90.47%
49.94%
47
20.8%
Yeboah, Seth
BST 322
Question 1 - Analysis of Heart Rate
For fun a medical school professor once made a class of med students jump up and down
for 1 minute and then measure their heart rate. Below are the values that were recorded:
136 144 99 145 135 125
SETH YEBOAH
BST 322
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
Contingency table
1
BST 322
Week 1 Assignment
1.
For each of the following (a through d), indicate which is a variable and which is a
constant:
a.
The number of minutes in an hour = Constant
b.
Systolic blood pressure= Variable
c.
Blood type= Variable
d.
The number of days
SETH YEBOAH
BST 322
DUE ON LAST DAY OF CLASS
COPY/PAST THIS UNDER WEEK #4 ASSIGNMENT AND THEN SUBMIT TO THE WEEK
4 DROPBOX
Extra Credit
Worth Up to 12 Points
Note: There are three overall questions with sub-questions, and each overall question is
worth up
BST322 Week 1 Assignment
Name:
Deymar Rios
Score:
Please type your answers directly on this sheet in a different colored font. Make sure to spell
check your work and present it in an organized fashion. Thank you.
1. (4 pts) For each of the following, indi
Diana Mendoza De Saenz
5/25/14
Week 2 Assignment
1. What is the probability of rolling a four in the gambling dice game of craps (given two six sided
dice)? What is the probability that a player can roll a four 3 times in a row (assume that rolling the
di
NSG 322 Introduction to Biomedical Statistics
Dr. Dave Allen
Email: allen.nu.edu@gmail.com (this e-mail address is also in the Blackboard course, so all
e-mails within this course will go this this e-mail address)
Linkedin Bio: http:/www.linkedin.com/prof
BST 322
Week 1 Assignment
1.
For each of the following (a through d), indicate which is a variable and which is a
constant:
a.
The number of minutes in an hour = Constant
b.
Systolic blood pressure= Variable
c.
Blood type= Variable
d.
The number of days i
Seth Yeboah
WEEK 2 ASSIGNMENT
1.
2.
Week 2 Assignment
What is the probability of rolling a four in the gambling dice game of craps (given two six
sided dice)? 3/36 or 8.33%. What is the probability that a player can roll a four 3 times in a row
(assume th
SETH YEBOAH
BST 322
BST 322 Week 2 Assignment
1.
What is the probability of rolling a four in the gambling dice game of craps (given two six sided
dice)? What is the probability that a player can roll a four 3 times in a row (assume that rolling
the dice
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
Seth Yeboah
Week 2 Assignment
1.
2.
BST 322 Week 2 Assignment
What is the probability of rolling a four in the gambling dice game of craps (given two six
sided dice)? 3/36 or 8.33%. What is the probability that a player can roll a four 3 times in a row
(a
Yeboah, Seth
BST 322
Week 1 Assignment
1.
For each of the following (a through d), indicate which is a variable and which is a constant:
a.
The number of minutes in an hour = Constant
b.
Systolic blood pressure = variable
c.
Blood type = variable
d.
The n
SETH YEBOAH
BST 322
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 correl
SETH YEBOAH
BST 322
Unit 4 discussion 1
A study from a Colombian research center is about to publish a pilot study regarding a new
coffee plant that they believe can reduce total cholesterol in humans. They gave increasing
doses (cups of coffee) to a test