Biostatistics for Public Health Sciences
Spring 2014, Homework Assignment 7
TR class: Due at the beginning of class on Tuesday, April 8, 2014
MWF class: Due at the beginning of class on Wednesday, April 9, 2014
Please write all homework solutions neatly.
Name: _
Elementary Biostatistics
BIOS 2010
Spring 2014, Practice Test 1 Solutions
FOR FULL CREDIT, YOU MUST SHOW ALL WORK AND EXPLAIN ALL REASONING.
1. The following histogram and boxplot show data from a smallpox outbreak in the
community of Abakaliki in
Biostatistics for Public Health Sciences
Spring 2014
Homework Assignment 8 Solutions
MWF Classes: Due at the beginning of class on Friday, April 18, 2014
TR class: Due at the beginning of class on Thursday, April 17, 2014
Please write all homework solutio
Poisson Distribution Practice Problems
1. Twenty sheets of aluminum alloy were examined for surface flaws. The frequency of the
number of sheets with a given number of flaws per sheet was as follows:
Number of Flaws
0
1
2
3
4
5
6
Frequency
4
3
5
2
4
1
1
W
Biostatistics for Public Health Sciences
Practice Test 3
1. For 6 patients entered in a clinical trial, blood measurements of 7-HCO were taken
before the start of treatment and after 1 month of treatment for each patient. The sample
mean difference in 7-H
Name: _
Biostatistics for Public Health Sciences
BIOS 2010, Spring 2014
Practice Test 2
1. In a large population,
of the people are left-handed. In a random sample of
people, let be the number that are left-handed. Assume that has a
binomial distribution.
Material Covered (since test 2):
Inference about a Population Mean
One-sample t-test
Assumptions
Procedure
Conclusions
One-sample Confidence Interval
Comparing Two Means
Paired Data
Paired T-Test
Assumptions
Procedure
Conclusion
Confidence i
BIOS 2010 72 897
Professor Turner
January 16, 2014
Homework 1
1.
This bar chart indicates that the number of cases of pediatric AIDS has doubled
throughout every year, showing a positive right skewed curve.
2.
a) Based on the total population distribution
BIOS 2010 72 897
Professor Turner
February 6, 2014
Homework 3
1 a) Events A and B are mutually exclusive because both events cannot happen at the same time.
There cannot be a person that is overweight and obese.
b) The person chosen is either obese or ove
HTN +
36
9
45
Test +
Test Total
HTN 25
230
255
Please calculate the following based on the information provided in the table:
Sensitivity
36/45 = 0.8
Specificity
230/255 = 0.9
Prevalence
45/300 = 0.15
Positive Predictive Value
36/61 = 0.59
Negative Predic
Name: _
Elementary Biostatistics
BIOS 2010
Spring 2015, Practice Test 1
FOR FULL CREDIT, YOU MUST SHOW ALL WORK AND EXPLAIN ALL REASONING.
1. The following histogram and boxplot show data from a smallpox outbreak in the
community of Abakaliki in southeast
BIOS 2010 72 897
Professor Turner
February 17, 2014
Homework 4
1 a. The sensitivity of the test is P (95|100) = .95
prevalence=.10
b. The specificity of the test is P (99|100) = .99
c. The positive predictive value of the test is .95*.10 / .95*.10+(1-.99)
BIOS 2010 72 897
Professor Turner
March 25, 2014
Homework 6
1 a) P(140 < x < 211)=
normalcdf(140, 211, 143, 29)= 0.53168
b) P(140 < x < 211)=
normalcdf(140, 211, 143, (29/36)= 0.73259
c) Even though the sample size used in part b is less than 40, the Cent