Homework #1.
Due at 5PM on Friday, February 15, to the UA18 homework box (on top of the faculty
mailboxes, 6 floor Econ Building). Late homeworks will NOT be accepted. No
exceptions.
Answers can be handwritten, but tables and graphs should be printed, eit
Homework #2.
Due at 5PM on Friday, February 22, to the UA18 homework box (on top of the faculty
mailboxes, 6 floor Econ Building). Late homeworks will NOT be accepted. No
exceptions.
Answers can be handwritten, but tables and graphs should be printed, eit
Deepal Basak
NYU ID:
Homework: 1
Q1) Ch-3
Q. 2) Ch-3
Q.3) Part 1 answer below is wrong.
Correct answer: Although both groups have almost same chance of carrying drugs, Afr are stopped more
often than W s. This indicates racial discrimination.
Q.4)
HW#4 Solution
1. Ch8 Q26 (More unusual points)
2. (Can use Excel)
(a)
(b)
The linear model is not appropriate because the association is clearly curved in the
scatterplot. Also, th
Homework #1.
Due at start of TA section on Friday, September 18. Late homework will NOT be
accepted. No exceptions.
10% penalty for NOT following these instructions: (1) Staple all sheets; (2) At the
top of the first page, include the following: Name, HW#
HW#3 Solution
1. (20%)
(1)
According to the Normal model, we expect 68% of cars to get between 19 and 29 mpg,
95% of cars to get between 14 and 34 mpg, and 99.7% of cars to get between 9 and 39
mpg.
(2)
z-score for 20 mpg is (20-24)/5 = -0.8.
HW#1 Solution
1.
a) 14,824/237,828 = 6.2%
b) 8858/237,828 = 3.7%
c) 12,699/21,047 = 60.3%
d) 4378/139,063 = 3.1%
2.
Data Questions:
3.
(1)
Police would argue that above rates do not indica
Homework #7.
Due at start of TA section on Friday, November 20. Late homework will NOT be
accepted. No exceptions.
10% penalty for NOT following these instructions: (1) Staple all sheets; (2) At the
top of the first page, include the following: Name, HW#,
Homework #5.
Due at start of TA section on Friday, October 30. Late homework will NOT be
accepted. No exceptions.
10% penalty for NOT following these instructions: (1) Staple all sheets; (2) At the
top of the first page, include the following: Name, HW#,
Homework #4.
Due at start of TA section on Friday, October 23. Late homework will NOT be
accepted. No exceptions.
10% penalty for NOT following these instructions: (1) Staple all sheets; (2) At the
top of the first page, include the following: Name, HW#,
Homework #3.
Due at start of class (lecture) on Monday, October 5. Late homework will
NOT be accepted. No exceptions.
10% penalty for NOT following these instructions: (1) Staple all sheets; (2) At
the top of
Homework #2.
Due at start of TA section on Friday, September 25. Late homework will NOT be
accepted. No exceptions.
10% penalty for NOT following these instructions: (1) Staple all sheets; (2) At the
top of the first page, include the following: Name, HW#
Chapter 2
Chapter 3
21. Super Bowl points 2013.
a) The median number of points scored in the first 48 Super Bowl games is 45
points.
b) Thefirstquartileofthenumberofpointsscoredinthefirst48SuperBowlgames is 35 points.
The third quartile is 54.5 (or 55) po
=-0.674*24+188
=0.674*24+188
27. Correlations conclusions I.
a) No. We dont know this from correlation alone. The relationship between age
and income may be non-linear, or the relationship may contain outliers.
b) No. We cant tell the form of the relation
School
A&S
Stern
Medi
Law
Total
Native Non-Native Total
100
110
210
70
40
110
20
10
30
40
10
50
230
170
400
a) what percentage students are native?
=230/400
57.5%
b) What percentage students come from A&S?
=(100+110)/400
c) What percentage of students com
These are additional exercises to help you review, but should NOT be used to guess
the content of the exam. Everything discussed in class may be covered in the exam.
Ch3 Q19
Ch3 Q20
Reminder: Midterm II is in class on April 11
These are additional exercises to help you review, but should NOT be used to guess
the content of the exam. Everything discussed in class may be covered in the exam.
HW 3
Deepal Basak
NYU ID:
Q1) 6.44
Q2) 7.28
Q3)7.40
Q4)8.34
Q5)8.40
2.66 = b_0 + 0.0021398 (1222)
b_0=0.045
GPA_hat=0.045+0.0021398 (SAT)
b) The model predicts that when SAT is 0, GPA is 0.045. But they are meaningless since these are
impossible scores.
d
ECON-UA 18: Statistics
Prof. Anthony Donoghue
Lab Session 7 March 31, 2017 Chapters 16 and 17
Solutions
Chapter 16
Examples:
1. Solution. Yes, X is a binomial random variable, because:
a) The coin is tossed in exactly the same way 100 times.
b) Each toss