Resource: Statistical Techniques in Business &Economics
Prepare responses to the following exercises from the text:
Exercises 80, 82, and 87 (Ch. 3)

80. Creek Ratz is a very popular restaurant located along the coast of northern Florida. They serve a variety of steak and seafood dinners. During the summer beach season, they do not take reservations or accept “call ahead” seating. Management of the restaurant is concerned with the time a patron must wait before being seated for dinner. Listed below is the wait time, in minutes, for the 25 tables seated last Saturday night.

a. Explain why the times are a population.
b. Find the mean and median of the times.
c. Find the range and the standard deviation of the times.

Exercises 34, 36, and 38 (Ch. 5) p164

34. P(A1) = .20, P(A2) = .40, and P(A3) = .40. P(B1IA1) = .25. P(B1IA2) = .05, and P(B1lAe) = .10. Use Bayes’ theorem to determine P(A3 @ B1).

36. Dr. Stallter has been teaching basic statistics for many years. She knows that 80 percent of the students will complete the assigned problems. She has also determined that among those who do their assignments, 90 percent will pass the course. Among those students who do not do their homework, 60 percent will pass. Mike Fishbaugh took statistics last semester from Dr. Stallter and received a passing grade. What is the probability that he completed the assignments?

38. One-fourth of the residents of the Burning Ridge Estates leave their garage doors open when they are away from home. The local chief of police estimates that 5 percent of the garages with open doors will have something stolen, but only 1 percent of those closed will have something stolen. If a garage is robbed, what is the probability the doors were left open?

Exercises 45 and 62 (Ch. 6)
45. A Tamiami shearing machine is producing 10 percent defective pieces, which is abnormally high. The quality control...

...Individual Assignment: Types of Surveys
Question 5 on p. 270 of Business Research Methods.
Patricia Figueroa
November 17, 2009
Qnt561
Christopher Ajagu
In the following situations, decide whether you would use a personal interview, telephone survey, or self-administered questionnaire. Give your reasons.
a A survey of the residents of a new subdivision on why they happened to select that area in which to live. You also...

...Week 6 Team D Discussion – Regression Analysis
QNT/561
November 28, 2011
Jonathan Edelman
Week 6 Team D Discussion – Regression Analysis
The following paper summarizes the review and discussion process undertaken by Team D examining four articles that each detailed one or more applications of regression analysis.
Comparison Methods of Multiple Linear Regressions in Fish Landing
Multiple linear regression (MLR) is used to analyze the...

...Central Limit Theorem and Confidence Intervals Problem Sets
Tiffany Blount
QNT561
September 7, 2010
Michelle Barnet
University of Phoenix
Central Limit Theorem and Confidence Intervals Problem Sets
Chapter 8 Exercises:
21. What is sampling error? Could the value of the sampling error be zero? If it were zero, what would this mean?
* Sampling error is the difference between the statistic estimated from a sample and the true population statistic. It...

...Week Four Team Paper
xxxxxxxxxxxxxx
QNT/561
August 1, 2012
xxxxxxxxx
Week 4 Team Paper
Best Buy is a company that has 40 years of history with a very accomplished sense of success. In 1966 Best Buy was a small electronics store in that originated in St. Paul Minnesota by Richard Schulze and an acquainted business partner. Considering that technology changes so rapidly, Best Buy has had to transform from just being the little...

...Individual Assignment:
Week 4
QNT561
November 1, 2010
Lee Chang
Question 5
In the following situations, decide whether you would use a personal interview, telephone survey, or self-administered questionnaire. Give your reasons.
a) A survey of the residents of a new subdivision on why they happened to select that area in which to live. You also wish to secure some information about what they like and do not like about life in the subdivision.
In this...

...
In this paperwork of QNT561 Final Exam you will find the answers on the next questions:
1. A difference between calculating the sample mean and the population mean is
2. Which of the following measures of central location is affected most by extreme values?
3. Which level of measurement is required for the median?
4. In which of the following distributions is the probability of a success usually small?
5. Which of the following is...

...
Name
Assignment
QNT/561
Date
Descriptive Statistics
Sales (in USD)
The distribution is normally distributed.
Central Tendency:
Mean = 42.84 dollars.
Dispersion:
Standard deviation = 9.073 dollars.
Count:
100
Min/Max:
Min is $23.00; Max is $64.00
Confidence Interval (alpha = 0.05):
$41.06 to $44.62
The histogram is present in Appendix A; the descriptive statistics are present in Appendix B.
Age
The distribution is not normally...

...27,28,28,28,29,34,37,39,40,44,44,45,50,51,56,61,61,64,65,67
- The median of the wait times is 39 minutes.
c. Find the range of the times.
Range is defined as the difference between the largest and the smallest values in the data set.
QNT561 – Week 1 Problem Set 3
- The largest value in the set of times is 67 and the smallest is 23.
- 67-23
= 44
d. Find the standard deviation of the times.
To do this, I first took...

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