Alexa Soares
Psych 240
T.A.: Andrea Cataldo
Collaboration with: Kripani Patel
1. Why should this be treated as matched-pairs problem, as opposed to a twosample problem?
A matched-pairs problem occurs in a case where we have only one sample of
individuals,
Alexa Soares
September 15, 2014
Psych 240: Homework #1
Collaboration With: Kripani Patel, Howstuffworks.com: marathon race timing
1. How many individuals are represented in the data set?
There are 14969 individuals represented in the data set.
2. How many
Alexa Soares
Psych 240: HW#8
T.A.: Andrea Cataldo
Collaboration: Erica Burke
1. State the null and alternative hypotheses regarding depression, and the null
and alternative hypotheses regarding alcoholism. In both cases, state these
hypotheses two ways: u
Alexa Soares
Psych 240: HW #6
T.A.: Andrea Cataldo
Collaboration with: Erica Burke
1. Use the skills you already have to summarize the distribution of the
salary variable. Make a histogram, with the appropriate number of
breaks, and a boxplot. Give the me
Alexa Soares
October 10,2014
Psych 240: HW 4
Collaboration: Kripani Patel, Erica Burke
1. Use the geometric distribution to figure out the probability that you will
meet THE ONE within (a) the first five people you date, (b) the first ten people
you date,
Alexa Soares
Psych 240: HW #7
T.A.: Andrea Cataldo
Collaboration: Kripani Patel, Erica Burke
1. For each of the four groups of subjects in the study, determine 90%, 95%, and 99%
CIs for the population mean Total AQ score. (Ignore gender for this part; jus
Alexa Soares
Psych 240: Homework #3:
T.A: Andrea Cataldo
Collaboration With: Kripani Patel, Erica Burke
1. Show all the output you just got, starting with the scatterplot. State a)
what the correlation is; b) how much of the variance in bfext is
explained
Alexa Soares
September 22, 2014
Homework #2, Collaboration with: Kripani Patel
T.A: Andrea Cataldo
1. Show the histogram of the netTime variable with several different values for the
breaks argument. What value for breaks seems appropriate? What would be
Alexa Soares
September 15, 2014
Psych 240: Homework #1
Collaboration:
1. How many individuals are represented in the data set?
There are 14969 individuals represented in the data set.
2. How many variables are represented in the data set?
There are 14 var
Alexa Soares
Psych 240: Homework #5
T.A.: Andrea Cataldo
Collaboration with: Erica Burke
1. Find the probability of an IQ score lower than 90. Find the probability of a
score lower than 125. (2 points)
2. A diagnostic criterion that is often used for mild
Alexa Soares
Psych 240
T.A.: Andrea Cataldo
Collaboration with: Kripani Patel
1. Why should this be treated as matched-pairs problem, as opposed to a twosample problem?
A matched-pairs problem occurs in a case where we have only one sample of
individuals,