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
Is the value of the
1.
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)? What is the probability that a player can roll a four 3 times in a row (assume that rolling the
dice each time does not a
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 in a week-
Question 1, Week 2
One sample T hypothesis test:
: Mean of variable
H0 : = 50
HA : 50
Hypothesis test results:
Variable
optimism score
Sample
Mean
44.534
Std. Err.
DF
0.330890 999
21
T-Stat
16.5190
74
P-value
<0.0001
1. State the null and alternative hyp
Week 3, Discussion 2
Can you create a StatCrunch crosstabulation table result for this data
(copied and pasted, as well as updated in Word), and a Chi-Square analysis?
Contingency table results:
Rows: in trouble
Columns: None
Cell format
Count
(Row percen
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 three and a
quarter cups of coffee a day. To get the answer, plot a regression li
1
Q1 Correlation between coffee and cholesterol
What is the correlation coefficient r and what does it mean in this case?
A. Coefficient r value is -0.73 and it means there is a moderate negative
correlation between caffeine(x) and cholesterol levels(y) -
Question 1
1 out of 1 points
If the Chi-Square statistic is less than the table value, we accept the
null hypothesis.
Selected
Answer:
Tru
e
Question 2
1 out of 1 points
Parametric tests can be used with any type of data.
Selected
Answer:
Fals
e
Question
Joyce Narciso
BST 322
July 28, 2016
Independent Project
1. Frequency distribution of a variable and bar graph of the same variable
- The frequency table below displays the statistics of marital status of women for this
sample. The nominal variable marital
BST 322
Week 4 Discussion 2
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 answe
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 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
BST 322
Week 3 Discussion 1
In order to for the table to be generated, Dr. Pilot first had to enter data into StatCrunch
under the contingency table option. Next, a dependent variable such as whether
complications were present were then inputted into the
Question 1
1 out of 1 points
This is used to compare means while controlling for the effect of a
covariate.
Selected
Answer:
ANCOVA
Question 2
1 out of 1 points
Generally, an ANOVA test is used when 3 or more variables are
compared.
Selected
Answer:
Fals
BST 322
Week 2 Discussion 2
Two sample T hypothesis test:
1 : Mean of Rest
2 : Mean of Accupuncture
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-Sta
BST 322
Week 2 Question 1 Discussion
One sample T hypothesis test:
: Mean of variable
H0 : = 50
HA : 50
Hypothesis test results:
Variable Sample Mean Std. Err. DF T-Stat P-value
optimism score
44.5340.33089021999-16.519074<0.0001
1.
State the null and al
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 VARIBALE
c.
Blood type VARIABLE
d.
The number of days in a week CO
BST 322
1.
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)? What is the probability that a player can roll a four 3 times in a row (assume that rolling
the dice each time do
Question 1
1 out of 1 points
Level of significance is symbolized by:
Selected
Answer:
Question 2
1 out of 1 points
A study in which a set of patients are tested for pain level before and
after being given a new pain medication would use which test?
Selec
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 of coffee) to
Anais Sheffer
BST 322
May 20, 2016
Chi-Square test in StatCrunch
The chi-square test is a nonparametric test used to make inferences about the existence of
a relationship between two categorical variables that are cross tabulated in a contingency table.
T
Anais Sheffer
BST 322
May 24, 2016
Week 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 co
NSG 322 Introduction to Biomedical Research
Week 4 Lecture
Correlation and Simple Regression
In a brief review of correlation, Pearsons r (correlation coefficient is used with
scale variables. The null hypothesis is that there is no relationship between t
Anais sheffer
BST 322
Week 3 Discussion 2
We want to know whether boys or girls get into trouble more often in school. We were
given a the table documenting the percentage of boys and girls who got into trouble in
school and computed it into Statcrunch.
H