STAT 350 Spring 2009 Exam 1 SOLUTION
Your Name: _ Your Seat: _ Section Time (circle): 10:30 11:30 4:30
Note: You are responsible for upholding the Honor Code of Purdue University. This includes protecting your work from other students. Show your work on a
STAT 350 Fall 2008
Homework #1 Solution covers thru Lecture #3
I expect problems to be submitted in order, including graphs. You must use a software program to create the graphs for this assignment. You do not need to use Minitab, but Excel is no
Homework 10 (9 points) due Dec. 2
(2.5 pts.) 11.12 (p.507) [Please use two different hypotheses tests.] Exercise 23 (Section 3.3) gave SAS output from a regression of attenuation on fracture strength.
a) Does the simple linear regression model appear to s
Homework 1 (7 + 5 (StatsPortal) = 12 pts)
due Aug. 30
(2 pts.) #1. A data set lists weather conditions in the Lafayette metropolitan area. Classify
the following variables as quantitative (discrete or continuous) or categorical:
a) The number of tornadoes
Chapter 2 Numerical Summary Measures
Section 2.1
1. (a) The sum of the n = 11 data points is 514.90, so x = 514.90/11 = 46.81. (b) The sample size (n = 11) is odd, so there will be a middle value. Sorting from smallest to largest: 4.4 16.4 22.2 30.0
Homework 10 (49 points)
(26 points LaunchPad + 23 points work + 2 points Bonus)
due Tuesday Nov. 17:11:55 pm
(1 pts. + 2 pts. BONUS) 1 (Problem 1.1). Written. In a one-way ANOVA, the k population
variances are assumed equal.
A. True
B. False
True. Populat
STAT 350
class: Dec. 4, 2013
due: Dec. 4, 2013
Lab 11: Review (BONUS) (upto 20 pts.)
SAS Key
Purposes: 1) Be able to determine which procedure is appropriate for a certain problem
2) Review the steps involved in performing statistics calculations
3) Revie
STAT 350 (Spring 2016)
Homework 5 Written Key
1
Homework 5 (26 points +1 point BONUS)
due Tuesday Feb. 16:11:59 pm
(1 pt. + 1 pt. Bonus) 1. If X is a uniform distribution defined over the interval (a,b) verify
that
( 1 pt . ) a E ( X )=
b
a+ b
.
2
[
]
b
1
STAT 350
class: Sept. 4, 2013
due: Sept. 9, 2013
Lab 3: Normal Quantile Plots (14 pts. + 1.5 pts. BONUS) Key
Purposes: 1) Create a Normal Quantile Plot
2) Generate random samples using specific distributions
3) Determine if a distribution is normal using
STAT 350 (Spring 2016)
Homework 2 Written Key
1
Homework 2 (20 points + 2 points BONUS)
due Tuesday Jan. 26:11:59 pm
(9 pts.) 1. An Internet search for the best deal on a 12-megapixel digital camera revealed
the following prices (in U.S. dollars).
160
169
STAT 350
MidTerm I (10/3/2011)
Fall 2011
Section (circle):
12:30 pm
2:30 pm
3:30 pm
Name: _KEY_
INSTRUCTIONS
1. Calculators (using the programmable features will not help you since ALL work including integration steps are required to receive full credit)
Chapter 7: Inference for
Distributions
A visual comparison of
normal and paranormal
distribution
Lower caption says
'Paranormal Distribution' - no
idea why the graphical artifact
is occurring.
http:/stats.stackexchange.com/questions/423/what-is-your-favor
Homework 5 (32.5 points + 1.5 points BONUS)
(22 points StatsPortal + 10.5 points work)
due Tuesday Sept. 30 11:55 pm (online), Wednesday in class for
hardcopy
Remember: we will add 1 pt to your written score to compensate for the offline
questions.
(1 pt.
Homework 5 (19 (Webpage) + 6 (Work) + 20 (StatsPortal) + 2 pts.
BONUS) = 45 pts.)
due Feb. 21
(4 pts.) #1: For the following situations, is the probability model subjective, empirical or
theoretical?
a) The growth index in the U.S. will increase in March.
STAT 350 (Spring 2016)
Homework 6 Written Key
1
Homework 6 (18 points)
due Tuesday Feb. 16:11:59 pm
(2.5 pts.) 1. State Farm Insurance Company would like to estimate the proportion of
volunteer firefighters across the country who are full-time teachers. T
Homework 8 (16.5 points)
(8 points StatsPortal + 8.5 points work)
due Tuesday Oct. 28 11:55 pm (online), Wednesday in class for
hardcopy
(0.5 pts. + 1 pt. work) 1 Problem 1 For many important processes that occur in the body,
direct measurement of charact
Homework 9 (11 (Webpage) + 10 pts. (work) + 19 (StatsPortal) = 40 pts.
+ 1 pt. BONUS)
due Nov. 1
(4 pts.) #1: 6.88 (p.375) Discuss these views. State whether or not you agree with each of
the following statements, and provide a short summary of the reason
Homework 7 (13 (Webpage) + 3 pts. (work) + 7 (StatsPortal) = 23 pts.)
due Oct. 18
(2 pts.) #1: Write the interpretation of StatsPortal Problems 3 and 4.2.
3. We are 95% confident that the true population mean monthly rent for unfurnished one
bedroom apart
Homework 4 (6 + 15 (StatsPortal) = 21 pts)
due Sept. 20
(3 pts.) #1: 2.94 (p.122). Whats wrong? Each of the following statements contains an
error. Describe each error and explain why the statement is wrong.
a) High correlation implies causation.
High cor
Homework from Section 5.4
5.27 (p.221). A chemical supply company currently has in stock 100 pounds of a certain chemical, which it sells to its customers in 5-lb lots. Let x denote the number of lots ordered by a randomly selected customer, and supposed
Homework 5 (25 (6 pts. for work) + 17 (StatsPortal) = 42 pts.)
due Sept. 27
(3 pts.) #1:4.32 (p.235). Spell-checking software catches nonword errors that result in a
string of letters that is not a word, as when the is typed as teh. When undergraduates
ar
Homework 6 (17 (Webpage) + 10 pts. (work) + 35 (StatsPortal) = 62 pts.
+ 3 points Bonus)
due Oct. 11
(2 pts.) #1: Verify the answers to parts a) and b) on Chapter 4 Slide 20.
An electronics company manufactures resistors that have a mean resistance of 100
Homework 10 (29.5 (Webpage) + 19 pts. (work) + 19 (StatsPortal) =
67.5 pts. + 1 pt. BONUS)
due Nov. 15
(3 pts.) #1: 14.2 (p.747). Whats wrong? For each of the following, explain what is wrong
and why.
a) In rejecting the null hypothesis, one can conclude
[30] Homework 3. Programming Assignment: Numerical Evaluation of Certain Sums
The goal of this assignment is to find good numerical approximations to certain sums. We need first a few definitions. For nonnegative integers 0 k n define n n! = k k!(n - k)!
STAT 350 (Spring 2016)
Homework 2 Written
Jia Fu 330-420 pm 1
(9 pts.) 1. An Internet search for the best deal on a 12-megapixel digital camera revealed the
following prices (in U.S. dollars).
160
169
783
90
129
188
300
295
600
579
356
553
(1 pt.) a) What
STAT 350 (Spring 2016)
Homework 1 Written
1 Jia Fu MF 330-420 pm
(7 pts.) 1. A weather station located along the Maine coast in Kennebunkport collects data on
temperature, wind speed, wind chill, and rain. The maximum wind speed (in miles per hour)
for 50