TUTORIAL 11: CHI SQUARE DISTRIBUTION
A tire manufacturer is studying the position of tires in blowouts. It seems logical that
the tire blowouts will be uniformly distributed among the four positions. For a sample
of 100 tire failures, is there
Bangor University Year 1 - Statistical Methods
What is Statistics?
Statistics: The science of collecting, organizing, presenting, analyzing, and interpreting data to
assist in making more effective decisions.
Note in this definition
TUTORIAL 2a: NUMERICAL MEASURES
The number of semester credit hours for seven part-time college students is: 8, 5, 4, 10, 8, 3, and 4.
In 1991, thirty acres of woods was valued at $475 per acr
TUTORIAL 10: LINEAR REGRESSION
A major oil company is studying the relationship between the daily traffic count and
the number of gallons of gasoline pumped at company stations. A sample of eight
company owned stations is selected and the follo
TUTORIAL 7: ONE SAMPLE TEST OF HYPOTHESIS
Last year the records of Dairy Land Inc., a convenience store chain, showed the mean
amount spent by a customer was $30. A sample of 40 transactions this month revealed
the mean amount spent was $33. As
TUTORIAL 4: PROBABILITY DISTRIBUTION
The safety engineer at Manellis Electronics reported
the following probability distribution for the number of
on-the-job accidents during a one-month period.
a. Compute the mean
b. Compute the variance.
TUTORIAL 2b: DISPLAYING AND EXPLORING DATA
Listed below are the selling prices (in thousands of dollars) of a sample of 20 vehicles sold by
salespeople employed by Ray Steele Auto Group in Albuquerque, New Mexico.
TUTORIAL 1: STATISTICS, FREQUENCY DISTRIBUTIONS AND GRAPHIC PRESENTATION
Multiple choice questions
1. Classify the following sets of data as qualitative or quantitative (Explain the difference between
_ 1. The religious affiliations of co
TUTORIAL 6: ESTIMATION AND CONFIDENCE INTERVALS
The Internal Revenue Service is studying contributions to charity. The mean
calculated from a random sample of 36 returns is $150. Assume that the population
standard deviation is known and equal
Total by year
2011 sales 1
Statistics for Managers Using Microsoft Excel
Chapter 4. Basic Probability
1) If two events are collectively exhaustive, what is the probability that one or
the other occurs?
D) Cannot be determined from the information given.
2) If t
PROBLEMS FOR SECTION 4.1
Learning the Basics
4.1 Two coins are tossed.
a. Give an example of a simple event.
b. Give an example of a joint event.
c. What is the complement of a head on the first toss?
4.2 An urn contains 12 red balls and 8 white balls. On
Faculty of Business Administration
Information Technology IT1
Neymar da Silva Santos Junior History
Advisor: Professor Juris Ozols
Table of Contents
Statistics for Managers
using Microsoft Excel
In this chapter, you learn:
Basic probability concepts
To use Bayes Theorem to revise probabilities
Various counting rules
TUTORIAL 3: PROBABILITY
A study was made to investigate the number of times
adult males over 30 visit a physician each year. The
results for a sample of 300 were:
a. What is the probability of selecting someone who
visits a physician twice a ye