1.Question :In general, an interval that contains a specified percentage of the individual measurements in a population is called a three sigma interval.

Student Answer: True

False

Points Received:1 of 1
Comments:

2.Question :A measurement located outside the outer fences of a box-and-whisker display is ____.

Student Answer: Always in the first quartile

An outlier

Always the largest value in the data set

Within the inner fence

Points Received:1 of 1
Comments:

3.Question :Stem-and-leaf displays and dot plots are useful for detecting

Student Answer:
Outliers

Skewness

Midpoint of data

All of the above

Points Received:1 of 1
Comments:

4.Question :When a population is skewed to the left or right with a very long tail, what is the best measure to use for central tendency.

Student Answer: Population mean

Population mode

Population median

Population standard deviation

Points Received:1 of 1
Comments:

5.Question :The science of using a sample to make generalizations about the important aspects of a population is known as

Student Answer: Statistical Process Control.

Descriptive Statistics.

A random sample.

Statistical Inference.

Points Received:1 of 1
Comments:

6.Question :The standardized value of any value in a population or sample is called

Student Answer: percentile

coefficient of variation

quartile

Z-score

Points Received:1 of 1
Comments:

7.Question :It is appropriate to use the Empirical Rule to describe a population that is extremely skewed.

Student Answer: True

False

Points Received:1 of 1
Comments:

8.Question :The population mean is the average of the...

...The general manager of the grocery store Wegmans in Canandaigua, NY, wants to know the average (typical) amount of time it takes for a customer to check out of his grocery store. Last Saturday between the hours of 8 am and noon the manager, along with a team of helpers, measured the amount of time it took the first 200 customers to check out at each of its open registers. The helpers recorded the time (in minutes) using a stop watch, starting when a customer first arrived at a line and ending when they had paid and received their receipt. The average time for the sample was 6.5 minutes.
Answer each of the following questions pertaining to the above paragraph. (40 points)
a) Identify the population being targeted by this study.
a. The population targeted is all of the customers shopping at Wegmans on that particular day.
b) Identify the sample.
a. The sample for this survey is all of the shoppers that came to Wegmans between 8am and noon on that particular day.
c) Can we say the sample chosen was randomly selected? If it is, explain why. If it's not, explain why not and note what type of sample it could be (given the information above).
a. I think the sample was not entirely random because they only took the first 200 individuals shopping, and they only measured for the first half of the day.
d) Identify the variable?
a. The variable is the amount of time it took the customers to check out
e) Is the data that resulted from this variable...

...Gas Prices
Nathaniel Peters
BUS 308: Statistics for Managers
Instructor: Ali Choudhry
August 8, 2011
Gas Prices
Delivery service is a way of life. Each day, people get packages sent to them by way of this service. But few people think of the costs the delivery company has to deal with. One of the main operating costs that we as a delivery company have is gasoline. We use gasoline daily in massive quantities. The cost of gas affects American’s daily, and people can be heard complaining about the high prices. What about delivery companies? In this paper, we will be discussing the effect of rising gas prices on our company throughout the next ten years.
Gas prices change daily, and throughout the year it is amazing to look at the monthly averages changing. In 2008 these averages varied from a low of 1.689 to a high of 4.09. That is a difference of 2.401, a huge difference within one year. So what is it that makes gas prices change so drastically? There is a formula of sorts to consider regarding why we pay what we pay for gasoline. The formula is: crude oil + refining process + retail sales/distribution + taxes = gasoline price. A good example of a sudden price change can be found in Hurricane Katrina. Many oil refineries and drilling operations were wiped out because of the hurricane, causing a spike in the gasoline prices because of the sudden decrease in supply. (Roy, 2010)
We at the delivery company have put together a data set to...

...Question 1
2 / 2 pts
What is a capital investment?
What is a capital investment?
using money to buy goods or services
issuing shares of stock of the corporation
authorizing and issuing shares of common stock by a multinational corporation
committing resources to projects that have costs and benefits well into the future
Correct!
Question 2
2 / 2 pts
Estimating the expected cash inflows and outflows from proposed projects is performed in what step of the capital budgeting process?
Estimating the expected cash inflows and outflows from proposed projects is performed in what step of the capital budgeting process?
project identification
project evaluation
Correct!
project monitoring
project review
Question 3
2 / 2 pts
Which capital budgeting technique is preferred in all major industrialized countries?
Which capital budgeting technique is preferred in all major industrialized countries?
net present value
internal rate of return
payback period
none of the above
Correct!
Question 4
2 / 2 pts
Why is it believed that Japanese companies prefer the payback period over the discounted cash flow methods for evaluating capital investment alternatives?
Why is it believed that Japanese companies prefer the payback period over the discounted cash flow methods for evaluating capital investment alternatives?
It is consistent with their...

...utilise mathematical skills to solve problems mentally. The marks scored by pupils generate statistics which are used by teachers to analyse a student’s performance and development of theories to explain the differences in performance.
The Standard 3 class is where the transition from junior to senior level occurs where teachers expect the transference of concrete to abstract thinking would have occurred.
A common theory by many primary school teachers is ‘Students perform better in Mathematics than Mental math. Mental math is something that has to be developed and involves critical thinking. Mental math requires quick thinking and the student must solve the problem in their minds whereas in regular mathematics, the problem can be solved visually. Therefore, teachers should take these factors into consideration while testing and marking students in these areas.’
In this study, the statistics of 30 students of a standard 3 class of San Fernando Boys’ Government School will be analysed to determine the truth of this theory.
DATA COLLECTION METHODS
Mathematics and mental mathematics marks of term 1 of the class of 2013 were obtained from a Standard 3 teacher of San Fernando Boys’ Government School.
The marks were divided into the form:
Mathematics Marks, x
Mental Mathematics marks, y
DATA PRESENTATION AND ANALYSIS
Sample number
Marks earned (x)
x²
1
70
4900
2
86...

...General Information
Part One (approximately 70 - 80% weight)
Overview:
Covers Chapters 1 – 5
Part One will begin promptly at 2:10 and end at 3:25. Students arriving late will not be given additional time. If you have a diagnosed learning disability which requires extra time, you must make arrangements with me at least one week in advance so arrangements can be made for you to take the exam at the ARC.
Consists of multiple-choice, true-false, short answer and short essay questions. There are no computational problems on Part One.
Closed book, closed notes.
Use of a cellphone, computer or other electronic device is not permitted. Please turn your cellphone completely OFF (including vibrate) for the duration of the entire exam.
Bring at least two #2 pencils. I will bring paper.
You may not wear a baseball cap during the exam. Please do not bring water bottles or food to the exam.
Once you have begun Part One, you may not leave the room for any reason.
Content:
Emphasis is on application and interpretation. Assuming you have read the chapter and competed all assigned homework for Chapters 1 through 5, the best way to prepare for this portion of the exam is to review:
the end of chapter summaries and all terms and concepts
your quizzes
the lecture notes and other class materials I have distributed
the powerpoint slides posted on ANGEL
how to interpret graphs and findings, such as r, r2
You may be asked to draw...

...
Quiz1
Each question is worth 2 points. Submit through your assignment folder by 11:59 PM EDT on September 7th.
I know I don’t need to remind anyone that UMUC’s academic integrity policies. We are all adults. We know that we shortchange only ourselves if we aren’t honest. This quiz needs to be completed without help from others. The work submitted must be your own.
What is the level of measure for each of the following:
Final grades in this class ____Ratio_________________
Weights of newborn babies____Ratio_________________
Seasons of the year_____Nominal________________
Boiling temperatures of different liquids_____Interval________________
Determine type of sampling used:
I collected shoe sizes from my family_____Convenience________________
1003 adults were called after their phone
numbers were randomly generated by computer ____Simple Random________________
Police stopped every sixth driver for sobriety test ____Systematic _______________
U.S.D.O.C. collected data by randomly selecting
Federal prisons and surveying every prison _____Cluster________________
I collected radon samples from basements inmy neighborhood and obtained the following:
Radon in cPiFrequency
2-5 2
6-9 2
10-13 6
14-17 15
Identify class width______4________________
Identify class midpoints3.5, 7.5, 11.5, 15.5______________________
Identify class boundaries1.5, 5.5, 9.5, 13.5, 17.5_____________________
Create a histogram...

...Week Two Assignment
BUS308: Statistics for Managers
Tiffany Aldridge
January 9, 2012
Week Two Assignment
Chapter 4: 4.4, 4.20
4.4
Suppose that a couple will have three children. Letting B denote a boy and G denote a girl:
a. Draw a tree diagram depicting the sample space outcomes for this experiment
b. List the sample space outcomes that correspond to each of the following events:
1) All three children will have the same gender. BBB, GGG
2) Exactly two of the three children will be girls. BGG, GBG, GGB
3) Exactly one of the three children will be a girl. BBG, BGB, GBB
4) None of the three children will be a girl. BBB
c. Assuming that all sample space outcomes are equally likely, find the probability of each of the events given in part b.
1) Probability of all three children having the same gender:
P(BBB)= 1/8
P(GGG)= 1/8
P(BBB) + P(GGG)= 1/8 + 1/8 = 2/8 = 1/4 = .25
2) Probability of exactly two of the three children will be girls:
P(BGG) + P(GBG) + P(GGB) = 1/8 +1/8 + 1/8 = 3/8 = .375
3) Probability of exactly one of the three children will be a girl:
P(BBG) + P(BGB) + P(GBB) = 1/8 + 1/8 + 1/8 = 3/8 = .375
4) Probability that none of the three children will be a girl:...

...Maria Liticia D.
BSEd III-A2
REFLECTION
The first thing that puffs in my mind when I heard the word STATISTIC is that it was a very hard subject because it is another branch of mathematics that will make my head or brain bleed of thinking of how I will handle it. I have learned that statistic is a branch of mathematics concerned with the study of information that is expressed in numbers, for example information about the number of times something happens. As I examined on what the statement says, the phrase “number of times something happens” really caught my attention because my subconscious says “here we go again the non-stop solving, analyzing of problems” and I was right. This course of basic statistic has provided me with the analytical skills to crunch numerical data and to make inference from it. At first I thought that I will be alright all along with this subject but it seems that just some part of it maybe it is because I don’t pay much of my attention to it but I have learned many things. I have learned my lesson.
During our every session in this subject before having our midterm examination I really had hard and bad times in coping up with this subject. When we have our very first quiz I thought that I would fail it but it did not happen but after that, my next quizzes I have taken I failed. I was always feeling down when in every quiz I failed because even though I...