MATH 2565 - Winter 2016
Assignment 1
1. A consulting company conducted a survey of U.S. residents for the U.S.
Department of Commerce Bureau of Economic Analysis. Each resident was
asked to indicate what he or she believes to be the most important social
MATH 2565 - Winter 2016
Assignment 2, Due Feb 9
Question 1: Customers at a Safeway grocery store in Scottsdale, Arisona
can pay for purchases with cash, an ATM card, or a credit card. Fifty-five
percent of all customers use cash and 38% use an ATM card. C
MATH 2565 - Winter 2016
Assignment 2, Due Feb 9
Question 1: Customers at a Safeway grocery store in Scottsdale, Arisona
can pay for purchases with cash, an ATM card, or a credit card. Fifty-five
percent of all customers use cash and 38% use an ATM card. C
MATH 2565 - Winter 2016
Assignment 1
(Due Date: Jan, 21, 2016)
1. A consulting company conducted a survey of U.S. residents for the U.S.
Department of Commerce Bureau of Economic Analysis. Each resident was
asked to indicate what he or she believes to be
7.1 Statistics, parameters, and sampling distributions
FINDING THE SAMPLING DISTRIBUTION
Keep in mind they want sample median so find median.
5 samples. 3 are chosen. (do permutation to find total outcome) Find median of the
samples. Add up their probabil
1.
a.
Social Issue
Frequenc
y
Housing
Transportation
Health Care
Education
Food
Other
TOTAL
245
112
153
71
133
306
1020
Relative
Frequenc
y
0.240196
0.109803
0.150000
0.069607
0.103039
0.300000
1.000000
Social Issue
Housing
Education
Transportation
Food
H
Question 1
Research concerning purchasing habits at the grocery store suggests that impulse buys
make up approximately 60% of all purchases. Suppose 100 customers are selected at random.
(a) Find the mean and variance of the number X of customers who make
Question 1: Suppose that 5% of all people ling their income tax forms seek deductions
that they know are illegal (that is, they cheat). On the other hand, 2% of all people incorrectly list deductions because they are unfamiliar with income tax regulations
MATH 2565 3.0 2014 Fall
Introduction to Applied Statistics
Instructor: Yuejiao Cindy Fu
Phone:
736-2100 ext 33772
Oce:
Oce hour:
N633 Ross
Mon 11:30-12:30 N633
Course home page: https:/moodle.yorku.ca
Text: Introductory Statistics: A Problem-Solving Appro
Question 1: In a recent report by CallOften, 38% of mobile phone users are their customers. The monthly charges of CallOften customers are normally distributed with mean
$65, and standard deviation $8. The monthly charges of non-CallOften customers are al
International Journal of Smart Home
Vol.7, No.5 (2013), pp.103-114
http:/dx.doi.org/10.14257/ijsh.2013.7.5.11
Design and Implementation of In-House Electronic Money Using
Java Cards
Hyun Joo Kim 1, Soo Jong Lee 2 and In Chul Shin3
1
Dept. of Electronics &
MATH 2565
Assignment 2
(Due Date: Feb 14, 2017)
Question 1: A survey of students in a large Introductory Statistics class asked about their
birth order (1 = oldest or only child; 2 = others) and which faculty of the university they
were studying under. He
Question 1:
(6 marks) At an old fashioned barber shop in Melbourne, Florida, 70% of
all customers get a haircut, 40% get a shave, and 15% get both.
a. (3 marks) What is the probability that a randomly selected customer gets a shave or
a haircut?
Solution:
MATH 2565 3.0 (2017 winter)
Solution of Assignment 2
Question 1: The data with the marginal totals are:
Birth Order
Faculty
1
2
Arts and Sciences 34
23
Agriculture
52
41
Human Ecology
15
28
Other
12
18
Total
113
110
Total
57
93
43
30
223
a. The probabilit
MATH2565 NOTES
Chapter 1:
Statistical Inference (based on samples): The process of concluding properties of an
underlying distribution by analysis of data.
Four steps of statistical inference:
1. Claim: This is a statement that we assume is true (In oth
9.1 The Parts of a Hypothesis Test and Choosing the
Alternative Hypothesis
Alternative has to be different than the null answer.
Since the question cannot be thinner or thicker then it uses not-equal.
9.2 Hypothesis Test Errors
Review questions
9.3 Hypoth
3.2
3.3 The empirical rule and measures of relative standing
3.4 five-number summary and box plots
BELOW IS HOW TO FIND Q1 and Q3. (also median is middle number)
#ASK IF MODIFIED BOX PLOT IS ON!
4.1 Experiments, Sample Spaces, and Events
Experiment: at le
Name: _ Date: _
1. Which option would serve as an intuitive estimate of the parameter
A)
B)
C)
D)
?
2. Which option would serve as an intuitive estimate of the parameter
A)
B)
C)
D)
?
3. Which option would serve as an intuitive estimate of the parameter
A
Name: _ Date: _
1. The _ is the claim that is assumed to be true, believed to be true, or is simply the
statement to be tested.
A) null hypothesis
B) alternative hypothesis
C) test statistic
D) true hypothesis
2. The _ represents change in the current sta
Name: _ Date: _
1. Select the CORRECT assumptions for the one-way ANOVA.
A) The sample size is large (n > 30), and the populations are normal.
B) Samples are selected randomly and independently from k population distributions,
which are normal and have eq
Name: _ Date: _
1. The _ is the claim that is assumed to be true, believed to be true, or is simply the
statement to be tested.
A) null hypothesis
B) alternative hypothesis
C) test statistic
D) true hypothesis
2. The _ represents change in the current sta
Name: _ Date: _
1. A single number computed from a sample that serves as a guess for a parameter is called
a(n):
A) point estimate.
B) approximate estimate.
C) confidence estimate.
D) confidence interval.
2. An estimator is a:
A) parameter and thus a fixe
Name: _ Date: _
1. In 2004, the San Francisco police began using DNA evidence in unsolved homicides.
The crime lab found evidence that suggested John Puckett was a DNA match for a crime
committed three decades earlier, based on 5 1/2 genetic locations. Us
Introductory Statistics:
A Problem-Solving
Approach
by Stephen Kokoska
Chapter 0
Why Study Statistics?
Copyright 2015 by W. H. Freeman and Company. All rights
reserved.
1
Statistical Inference
Procedure
The process of checking a claim
can be divided into
Name: _ Date: _
1. As used in the text, an experiment is defined as an activity in which:
A) there is one outcome that is certain to occur.
B) the uncertainty of the outcome is so great that we cannot hope to make reasonable
predictions.
C) there are at l
Name: _ Date: _
1.
Above is a pie chart summarizing the ages of a kindergarten class (4-, 5-, 6-, and 7-yearolds). What is the relative frequency of four-year-olds in this class?
A) 3
B) 4
C) 0.143
D) 0.190
Page 1
2.
International passengers on a commerci
Name: _ Date: _
1. A density curve is a:
A) mathematical device that adjusts (equalizes) probability across the range of data.
B) smooth curve that visually displays the distribution of probability for a continuous
random variable.
C) visual display that
Name: _ Date: _
1. A function that assigns a unique numerical value to each outcome in a sample space is
known as a(n):
A) unique number generator (UNG).
B) outcome assigning function (OAF).
C) random variable (RV).
D) random vehicle (RV).
2. An experimen
Name: _ Date: _
1. A data set consisting of observations on only a single characteristic, or attribute, is a
_ data set.
A) bivariate
B) multivariate
C) random
D) univariate
2. A data set consisting of two observations on each individual subject is a _ da
Name: _ Date: _
1. Measures of _ indicate where the majority of the data are centered, bunched, or
clustered.
A) variability
B) precision
C) central tendency
D) predictability
2. x is the:
A) population mean.
B) sample mean.
C) geometric mean.
D) sample m