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
1.
2.
3.
4.
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: Constant
1
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
Contingency table
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
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 each time does not a
BST 322
Week 2 Discussion 1
The data contained was collected from 1,000 women in the area. Run a one sample t test on the
women's state of optimism given that the National norm on this test for all women is 50.0.
Hypothesis test results:
: Mean of variab
BST 322
Week 3 - Discussion 1
To get StatCrunch to generate them, first I opened up Stat Crunch and gathered all of
the data for the Table. Then I enter my information in Stat crunch -> Table->
Contingency-> with Summary. I selected 72 hour and 96 hour as
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.
0.25x0.25=0.0625
0.36x0.36=0.123
0.50x0.50=0.25
0.45x0.45=0.203
For each coefficient of determinat
BST 322
Week 1 Quiz
The variable religion is an example of what level of data?
Nominal
Correlation coefficient test allow you to determine if a cause and effect relationship is present.
False
When calculating a Pearsons r correlation coefficient, it is ne
BST 322
Week 2 Quiz
The Central Limit Theorem states:
The mean of a sampling distribution of means is equal to the population mean
In Inferential statistics, the objective is to determine how probable it is that:
The null hypothesis is false
What does it
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