Stat 2225
Spring 2016
Assignment #1 (Answer Key) [Total 40 marks]
1.
[7marks]
(a) The actual (or population) average debt of students graduating from public colleges and universities.
[1]
(b)
(c)
Quite obvious that the sample size is 245; (therefore by Ce
Stat 2225 Section 2
Spring 2016
Assignment #2 (due Feb 4) (Total 51 marks)
(Note: Whenever the question is a hypothesis test question, you MUST include the
appropriate alternative hypothesis Ha)
1. [6 marks]
The Ministry of Transportation provides the num
1.in the neoclassical model
if labour force or population increase, so real GDP increase and the material living standards
will be decrease
if average GDP per person is falling , then the total output is growing and living standards
will be decrease
st
1b: Statistical Studies
STAT 1123
Objective (of a study)
An objective is simply a statement or a sentence outlining what you plan to do in
the study. A study can have several objectives.
A proper objective should answer the four Ws who, what, where and wh
2: Sampling Methods, Data
Collection & Bias
STAT 1123
Population
Population:
refers to the group of subjects we are interested
in or we want to know information from.
Another common name of it is target population.
Population size, : The number of subj
STAT 1123 Assignment 8 No Due Date Model Answers
1. Page 352, Question 17 a. H0: = 125500 Ha: 125000 b. Test statistic = (118000-125500)/(30000/sqrt(40) = -1.58 p-value = 2* P(z < -1.58) = 0.1142 c. Since p-value = 0.1142> 0.05, we do not reject H0. There
Stat 2225 Section 2
Spring 2016
Assignment #1 [40 marks] (due Jan 18)
Show all the calculations. If you use SGC, please include the SGC result printout.
And please state clearly why you can apply CLT.
1.
[7 marks]
The National Association of Independence
Stat 2225
Spring 2016
Assignment #2 (Answer Key) (Total 51 marks)
1.
[6]
(a) The distance driven by the residents of that big city, and the distance driven by the residents of that small city.
[1]
(b) No, it is not necessary (but as a good practice you sh
Stat 2225
Spring 2016
Assignment #3 (due March 3) (Total 64 marks)
(Note: Youre allowed to use SGC to do all the calculations if you wish. If you do in this way, you MUST
include the SGC result. For any ANOVA question, including an ANOVA table is a MUST!)
STAT 1123 Section 5 Quiz 4 March 30, 2010
Name: Student ID:
You have 30 minutes to complete the following Total Points: 16
1. It was reported that 80% of ABC Bank's customers satisfied with the services provided by the Bank refer the bank to a friend. For
Page: 1 STAT 1123 Section 5 Quiz 3 March 16, 2010 Name: Student ID:
You have 30 minutes to complete the following Total Points: 16
1. ABC Credit union has completed an internal employee satisfaction survey. The key question in the survey is whether the cr
Page 1
STAT 1123 Section 5 Mid Term 2 April 6, 2010 Model Answers You have 60 minutes to complete the test. The total number of points is 25. 1. Household income of customers applying for a mortgage at ABC Bank follows a Normal distribution. The average h
STAT 1123 Section 005 Mid Term 1 Spring 2010 March 4, 2010 Name: ID:
You have 60 minutes to complete the following Total 26.5 Points 1. A recent study revealed that many City of Vancouver high school students have changed their transportation habit and us
STAT 1123 Spring 2010 Assignment 6 Due March 30, 2010 Model Answers
1. Given that z is a standard Normal random variable, find the following probabilities: a. P(z <0.52) = 0.6985 b. P(z > -0.63) = 0.7357 c. P(-0.31<z<1.345) =0.9115 0.3783 = 0.5332 2. Give
STAT 1123 Spring 2010
Assignment 5
Due March 17, 2010
Model Answers
1. Page 161, Question 25
a. P(M or F) = P(M) + P(F) - P(M and F) = 0.56 + 0.42 - 0.24 = 0.74
b. P( neither M nor F) = 1 P(M or F) = 1 0.74 = 0.26
2. Page 162, Question 29
a. P(E) = 1033/2
STAT 1123
Spring 2010
Assignment 4
Model Answers
1. An experiment was carried out in a local university to investigate the feasibility of
offering on-line courses in its business program. Two sections of an introductory
marketing course were chosen. One w
13: Confidence Intervals
STAT 1123
Margin of Error and the Interval Estimate
A point estimator cannot be expected to provide the
exact value of the population parameter.
An interval estimate can be computed by adding and
subtracting a margin of error to