Overlook Video Stores Inc.
Users
Bank
The owners (Victor Ziegler)
CRA
Objectives
Loan purposes/and to assess profitability
Bonus / Performance evaluation
Tax determination purpose
Constraints
ASPE
ASPE
ITA
ASPE vs. IFRS
As a private company, OVS is not pu
Descriptive Statistics
Everything dealing with collection, processing, analyzing, and interpretation of numerical data belongs to the domain of statistics. Statistics as a science develops statistical ideas from its probabilistic foundation, and applies
Math 4030 Assignment 7 (Problems)
Due: Nov. 5, 4:00PM
1. Following are the times (in minutes) between 911 calls (for ambulances) and the
patients arrivals at hospital:
27, 15, 21, 35, 18, 20, 23.
Assume that the times between calls and the patients arriva
Math 4030 Assignment 7 (Problems)
Due: Nov. 5, 4:00PM
1. Following are the times (in minutes) between 911 calls (for ambulances) and the
patients arrivals at hospital:
27, 15, 21, 35, 18, 20, 23.
Assume that the times between calls and the patients arriva
Math 4030 Assignment 8 (Problems)
Due: Nov. 12, 4:00PM
1. Use the highway salt usage data in Exercise 7.1 (textbook page 212).
a) Construct a 95% confidence interval for the true population mean amount of
salt required for a snowstorm (Exercise 7.2).
b) I
Math 4030 Assignment 8 (Solutions)
Due: Nov. 12, 4:00PM
1. Use the highway salt usage data in Exercise 7.1 (textbook page 212).
a) Construct a 95% confidence interval for the true population mean amount of
salt required for a snowstorm (Exercise 7.2).
b)
Math 4030 Assignment 10 (Problems)
Due: Nov. 26, 4:00PM
1. A laboratory technician is timed 20 times in the performance of a task, getting
x = 7. 9 and s = 1. 2 minutes.
(a). Test the null hypothesis that the average time is 7.5 min against the
alternativ
Math 4030 Assignment 9 (Solutions)
Due: Nov. 19, 4:00PM
1. Exercise 7.54 on textbook Page 234. (Use P-Value Method)
Solution. (a)
Null Hypothesis H 0 : = 1. 5;
Alternative Hypothesis H 1 : > 1. 5 (Researchers hypothesis: the mean labor
time is more than 1
Math 4030 Assignment 11 (Problems)
Due: Dec. 3, 4:00PM
Use the data provided in either
Exercise 11.2 on textbook Page 315 if you only use handheld calculators, or
Exercise 11.12 on textbook Page 317 if you use computer software (Excel,
etc.)
1. Make a s
Math 4030FA
Midterm Exam (Solutions)
Date: Oct. 15, 11:30PM
Questions 1-8: Circle the most appropriate answer (2 points for each
correct answer.)
1. A random sample of 100 pieces of cotton fibers was taken and the absorbancy on
each piece was measured. Th
Math 4030 Assignment 10 (Solutions)
Due: Nov. 26, 4:00PM
1. A laboratory technician is timed 20 times in the performance of a task, getting
x = 7. 9. Assume the population is normal with = 1. 2 minutes.
a. (a). Test the null hypothesis that the average ti
Math 4030FB
Midterm Exam (Solutions)
Date: Oct. 15, 12:30PM
Questions 1-6: Circle the most appropriate answer. (2 point for each
correct answer.)
1. A random sample of 100 pieces of cotton fibers was taken and the absorbancy on
each piece was measured. Th
Math 4030 Assignment 6 (Solutions)
Due: Oct. 29, 4:00PM
1. Two random variables X and Y have the joint density
kye x , 0 < x < , 0 < y < 1
fx, y =
elsewhere.
0,
(a) Determine the value of the constant k;
Solution.
1=
0 0 kye x dydx =
1
1k
2
k = 2.
(b) Fi
Math 4030 Assignment 6 (Problems)
Due: Oct. 29, 4:00PM
1. Two random variables X and Y have the joint density
fx, y =
kye x , 0 < x < , 0 < y < 1
0,
elsewhere.
(a) Determine the value of the constant k;
(b) Find the probability PX > 1, Y > 0;
(c) Find the
Math 4030 Assignment 5 (Problems)
Due: Oct. 22, 4:00PM
1. The life, in thousands of miles, of a certain type of electronic control for
locomotives has an approximately lognormal distribution with = 10. 14 and
= 0. 655. Find
a) the probability that a rand
Math 4030 Final Exam
Math 4030
This is page 1 of 14
Name: _
Final Exam
(Dec. 14, 2007)
Math 4030 Final Exam
Name: _
1. (5 points.) Given the following data set
55, 67, 89, 33, 31, 22,
find mean, median, the 75th percentile, and the first quartile. Constru
Math 4030 Assignment 1 (Problems)
Due: Sept. 17, 4:00PM
1. A random sample of 30 pieces of cotton fibers was taken and the absorbancy on
each piece was measured. The following are the absorbency values:
(a) Choose an appropriate table to summarize the dat
Math 4030 Assignment 2 (Problems)
Due: Sept. 24, 4:00PM
1. Exercise 3.58 on Textbook Page 75, using Figure 3.12 on Page 66.
2. In an experiment to study the relationship of hypertension and smoking habits, the
following data are collected form 180 individ
Math 4030 Final Exam
Math 4030
Name: _
Final Exam
Name _
Student ID: _
This is page 1 of 16
(Dec. 14, 2013)
Math 4030 Final Exam
Name: _
Part I. (1.5 points each.) Circle the correct answer (Only one is correct)
1. If random variables X and Y are independ
Math 4030 Assignment 1 (Solutions)
Due: Sept. 17, 4:00PM
1. A random sample of 30 pieces of cotton fibers was taken and the absorbancy on
each piece was measured. The following are the absorbency values:
(a) Choose an appropriate table to summarize the da
Math 4030 Assignment 3 (Problems)
Due: Oct. 1, 4:00PM
1. Check whether the following can define probability distribution, and explain your
answers.
a : fx = x , x = 1, 2, 3, 4.
10
5 k , k = 1, 2, 3, 4, 5.
b : fk =
10
8 y2
c : fy =
, y = 1, 2, 3, 4.
2
k 3
Math 4030 Assignment 4 (Problems)
Due: Oct. 8, 4:00PM
1. The probability density function of a random variable X is given by
fx =
kxe x ,
0<x<4
0,
elsewhere
,
where k is a constant.
a) Determine the constant value k.
b) Find the cumulative distribution fu
Math 4030 Assignment 3 (Solutions)
Due: Oct. 1, 4:00PM
1. Check whether the following can define probability distribution, and explain your
answers.
a : fx = x , x = 1, 2, 3, 4.
10
5 k , k = 1, 2, 3, 4, 5.
b : fk =
10
8 y2
c : fy =
, y = 1, 2, 3, 4.
2
k 3
Math 4030 Assignment 5 (Problems)
Due: Oct. 22, 4:00PM
1. The life, in thousands of miles, of a certain type of electronic control for
locomotives has an approximately lognormal distribution with = 10. 14 and
= 0. 655. Find
a) the probability that a rand
Math 4030 Assignment 4 (Solutions)
Due: Oct. 8, 4:00PM
1. The probability density function of a random variable X is given by
kxe x ,
0<x<4
0,
fx =
elsewhere
,
where k is a constant.
a) Determine the constant value k.
Answer:
0 kxe x dx = k3e 4 + 1 = 1 k
Math 4030 Assignment 11 (Solutions)
Due: Dec. 3, 4:00PM
Use the data provided in either 11.2 on textbook Page 315:
1. Make a scatter plot and comment on whether there is any linear correlation
between the two variables, the strength, and the direction;