STA 527/427
Graded Homework 1
Due: 9/7/2012
Find, copy, and submit a research article from a scientific journal that uses data to answer
questions and is 6 pages or less (slightly larger articles okay but please try to stay within
the limit). Submit a cov
STA 527/427
Graded Homework 5 - Solutions
mean IFN readings.
1. We have 100 observations from a continuous distribution where
The standard deviation of IFN readings is unknown.
2.
Descriptives
Statistic
Mean
Response
19.193
95% Confidence Interval for
Low
STA 527/427
Graded Homework 5
Due: 11/2/2012
Directions: Some of the problems below require the use of SPSS. Be sure to include only
relevant output from SPSS and clearly label your answers. For questions that require
hand calculations, be sure to show yo
STA 527/427
Graded Homework 4
Question one
Suppose that
is a random variable with the following distribution
0
1
2
3
Compute
and
0.512
0.384
0.096
0.008
.
1(0.384) 2(0.096) 3(0.008) 0.6
2 (0 0.6) 2 (0.512) (1 0.6) 2 (0.384) (2 0.6) 2 (0.096) (3 0.6) 2 (
STA 527/427
Graded Homework 4
Due: 10/05/2012
Question one
Suppose that
is a random variable with the following distribution
0
1
2
3
Compute
and
.
0.512
0.384
0.096
0.008
Question Two
A pharmaceutical company produces a drug which is designed to reduce de
STA 527/427
Graded Homework 3 - solutions
Question one
Suppose that P( A) 0.3 , P( B) 0.4 , and P( A B ) 0.7 .
Step one:
P( A B ) P( A) P ( B ) P( A B )
0.7 0.3 0.6 P( A B )
0.7 0.9 P( A B )
P( A B ) 0.2
A
A
B
B
0.1 0.2 0.3
0.3 0.4 0.7
0.4 0.6
a) P( A) 0.
STA 527/427
Question one
Suppose that P( A) 0.3 , P( B) 0.4 , and P( A B ) 0.7 .
Compute the following probabilities:
a) P( A)
b) P( A B)
c) P( A B )
d) P( B | A)
e) P( A | B)
Graded Homework 3
Due: 9/21/2012
Question two
The side effects of nonsteroidal
STA 527/427
Graded Homework 2
Due: 9/14/2012
Directions: Some of the problems below require the use of SPSS. Be sure to include only
relevant output from SPSS and clearly label your answers. Disorganized homework
write-ups will be marked down.
Question on
STA 527/427
Graded Homework 6
Due: 11/30/2012
Suppose investigators wish to study the mean of a continuous outcome (Y). A total of 11
subjects were randomly assigned to each of four treatment groups. We wish to compare
the mean of Y among these four group