STAT 202
Assignment 2
Name: Kara David
1.
Section 006
Highway 66 into the district is entirely HOV during the rush hours. On any given week day during the rush
hour, the probability that there is a single occupancy car on the road is about 32%. If 20 cars
STAT 202
Assignment 2
Name:
1.
Highway 66 into the district is entirely HOV during the rush hours. On any given week day during the rush
hour, the probability that there is a single occupancy car on the road is about 32%. If 20 cars are randomly
picked at
Aaron Grushkin
11/17/10
Lab 2: From Data to Decision
1.
Summary statistics:
Column
n
Mean
Variance
Std. Dev.
Std. Err.
Median Range Min Max Q1 Q3
Best
Actresses
79
35.848103
126.87407
11.263839
1.2672809
33
59
21
80
28
40
Best
Actors
79
43.79747
80.06102
STAT 202
Assignment 1
Name: Kara David
Section 006
1. The Survey of Study Habits and Attitudes (SSHA) is a psychological test that evaluates college students
motivation, study habits, and attitudes toward school. A selective private college gives the SSHA
STAT 202
Assignment 3
Name: Kara David
1. Consider a population that consists of the numbers 4, 5 and 6.
a. Find the mean and standard deviation of the population.
=
5
= 0.816
Based on a sample of size two, (sampling with replacement) list all the possibl
STAT 202
BASIC STATISTICS
Fall 2015
Exam 3
Name: Kara David
Section: 006
Instructions: This exam has five problems. The correct answer alone is worth very little credit
you must give understandable explanations and justifications to get a passing grade.
#1. Hypothesis Testing with Two Populations (means). You are given sample data from two populations
in the accompanying EXCEL file for this assignment. For this question, please use = 0.04. Please
round to two decimal places in your work/answer.
(a) Condu
Kara David
Professor Okoth
Statistics-202-006
16 October 2015
Quiz Four
Page 250: Problems 4.28, 4.36, 4.37, 4.38, and 4.44.
4.28a: (0.134)2 = 0.017956
4.28b: The complement would be at most one ringtone is Girl on Fire
1 P (0.017956) = 0.982044
4.36a: 1/
Kara David
Professor Okoth
Statistics-202-006
7 October 2015
Optional Quiz
Page 190
3.34a: The problem with this is that it will be unclear whether it was the treatment or the gender
of the students that influenced the outcome. To prevent this, assignment
Kara David
Professor Okoth
Statistics-202-006
17 September 2015
Quiz Three
Page 99
2.24a. Weak Negative Relationship
2.24b. No Apparent Relationship
224c. Strong Positive Linear Relationship
2.24d. A more complicated relationship (nonlinear relationship)
Kara David
Professor Okoth
Statistics-202-006
6 November 2015
Quiz Five
Page 317: Problems 5.10, and 5.16
Page 345: Problems 5.54, 5.63, and 5.78.
Page 317
x
5.10a: The central limit theorem states that for a large n, is approximately normal
5.10b: The me
Statistics Notes
10/6/15
Probability and Randomness:
Brief History: The mathematical theory of probability started with correspondence
between Pascal and Fermat (French mathematicians) in 1654. In addition, many of the
methods we use in probability origin
#1. Consider the information for #7 on pp. 518-519, [question begins with Social networking is
becoming more and more popular around the world ]
(a) Please conduct a four-step hypothesis test as described in a. from the textbook question.
a. Ha: p1=p2=p3=
Name: _
JHUAdvanced Academic Programs
Graduate Program for Applied Economics
Statistics 440.605.82
Summer 2015
HWUNIT #5 DUE MON June 22 by 5PM (EST)
Please read each question carefully and answer it completely. Extra work not explicitly needed
can be cop
Name: Nate Youngblood
JHUAdvanced Academic Programs
Graduate Program for Applied Economics
Statistics 440.605.82
Summer 2015
HWUNIT #2 DUE TUES May 26 by 5PM (EST)
Please read each question carefully and answer it completely. Please fill in the tables and
Please read each question carefully and answer it completely. Extra work not explicitly needed
can be copied into the end of document in the Appendix. If an answer is incorrect, including work
in the Appendix might allow for minimal partial credit. (Note
Statistics Notes
10/13/15
A random variable is a variable whose value is a numerical outcome
of a random phenomenon
There are two types of random variables; discrete and continuous
random variables
A discrete random variable X has a finite number of possi
Statistics Notes
10/16/15
4.75 A random variable X has the following distribution.
X
Probability
-1
0.3
0
0.2
1
0.2
2
0.3
Find the variance and the standard deviation for this random variable. Show your work.
2 = x2p(x)-2
= 0.5
2 = 1.7 0.25
2 = 1.45
= 1
Statistics Notes
October 20, 2015
4.115:
A:
Men Women Total
4-year institution 0.2684 0.3416 0.61
2- year institution 0.1599 0.2301 0.39
Total
0.4283 0.5717 1
P ( Male| 4 Year
x
= x = 0.44(0.61) = 0.2684.
P (males | 4 year) = 0.44 =
=
0.61
P( 4 Year)
P (
Statistics 202
September 30, 2015
Data Collection:
How do we obtain the data that we use?
Population: the entire group on individuals in which we are interested but cant
usually assess/access directly.
Parameter: a number describing a characteristic of th
STAT 202
Assignment 2
Name: Kara David
1.
Section 006
Highway 66 into the district is entirely HOV during the rush hours. On any given week day during the rush
hour, the probability that there is a single occupancy car on the road is about 32%. If 20 cars
Kara David
Professor Okoth
Statistics-202-006
4 November 2015
Extra Credit Question
1. How do they compute the sampling error for opinion polls?
Any survey that is taken using random sampling is subject to sampling error. Sampling error
is the error in a
Statistics 220
September 25, 2015
From Last Time
o Before we can find the regression line, certain assumptions about the data
must hold.
o These assumptions are:
For every specific x value the y values are normally distributed bout
the regression line (N
Chase Burton
Emotion (The Triune Brain / Love and Monkeys)
30 April 2017
I think I would enjoy being a stay-at-home dad. My own father filled that role for a while,
a year or two after my little brother was born. We have largely begun to move beyond the i
Chase Burton
Consciousness Reaction Paper
12Feb2017
Consciousness has always been something of a sticky subject for our species. The more
spiritual or religious individuals -or simply those afraid of losing what fundamentally makes them
an individual- wil
Chase Burton
Service Project Reflection
23 April 2017
The primary purpose of the senior service project is to encourage a long-term habit of
community service, with a secondary benefit of creating or improving relations between the
Battalion and the commu
Chase Burton
Why do we sleep?/One more reason to get a good nights sleep
30 April 2017
I love sleep. Its one of the few times in life where I am genuinely happy, with no
reservations. Unfortunately, Im also usually jarred from my sleep by the alarm at aro
Chase Burton
Stats Homework 17
26April2017
7.18
a. Degrees of Freedom = n-1 = 16-1 = 15
LoS = a = 1-0.95 = 0.5
Critical Value of t at 95% confidence with a sample size of 16 observations is +/-2.131
Critical Region is cfw_t:t<-2.131 or t>2.131
7.22
a. Deg
Chase Burton
Brain/Sex/Reproduction Reflection Paper
22 March 2017
Gender and Sex have become surprisingly hot-button topics within social circles. While
there are anomalies within the binary roles of physical Sex, these tend to be the exceptions that
pro
Chase Burton
Stats Homework 15
14April2017
6.16
a. In the given statement, direct value n is considered instead of n
b. The statement extends the interval to the proportion of members, which is not valid.
c. The error is inversely proportional to the samp
Chase Burton
Stats Homework 16
18April2017
6.52
a. When testing a null hypothesis, Mu0 is used. Xbar is the mean of the observed values
b. Given n=30, sigma=5, the standard deviation of the sample mean would use the formula
sigmaxbar=(sigma/n) = 5/30 = 0.
Chase Burton
Stats Homework 18
28April2017
7.63
a. Incorrect - in order to test the hypothesis, it should contain the population mean instead
of the sample means
b. Incorrect - the samples are into independent
c. Incorrect - we need a small P-value to rej
Chase Burton
Hebbian Theory
21 January 2017
1. Neuron cells become wired through repetition and practice behavior when the given
neurons fire together. This explicitly must happen at the same time; one cell firing slightly
after the other is not sufficien