Ch. 4 Practice Problems 11, 14, & 18
11. List the five steps of hypothesis testing, and explain the procedure and logic of each.

The first step in testing hypotheses is to take the question at hand and turn it into a pair of theories that can be tested; the question is stated as a research hypothesis, and as a null hypothesis about the populations to be studied. The purpose behind this is to establish something to test the research hypothesis against, and essentially proving that the opposite of something is false is the same as proving that the thing is right. A prediction is made and then the polar opposite of the prediction is studied to ascertain its validity. If the null is proved wrong then the research hypothesis testing can move forward, and if it is proven to be true then the research hypothesis must be rejected. The next step is to ascertain the values of the comparison distribution, the population conditions that exist when the null hypothesis is true. This is done by identifying what the odds are of a given result occurring in a case where the null hypothesis is true. The idea behind this is to provide a gauge, by comparing the score you get against a model of the same score and its probability of happening if the null hypothesis were true. Now it is time to find out the point on the comparison distribution that eliminates the null hypothesis from being valid, the cutoff sample score. This is found using percentages and Z scores, and assessing the likelihood of scores landing in or near the tails of the curves. A number is agreed upon as a cutoff, so that if the sample score reaches that threshold then the null hypothesis is rejected, and if it does not then the null hypothesis is not rejected. The sample scores on the comparison distribution are then figured out by performing the research and observing the results. Once the numbers are established, the sample Z score is figured based on the mean for the population and the...

...when the numbers in order have a value. An example would be coming in 1st, 2nd, or 3rd place
(C) nominal is when values are types instead of quantities. An example of this could be types of mental illness, depression, schizoprinea,and post traumatic stress disorder.
(d) Ratio scale is the scale that an equal interval is calculated on when it has got an absolute zero point. An example of this would be 1:4 people went to the concert as the map shows who attended both days’ events. 1:4 represent 1 out of 4
(e) Continuous variable is there are in theory an infinite number of values between any two values. Example of this is saying your son is 1 or 2 or saying he is 1.25 years old
Following are the speeds of 40 cars clocked by radar on a particular road in a 35-mph zone on a particular afternoon:
Make (a) a frequency table
Speed Frequency
15 1
20 1
23 1
24 1
27 1
28 1
30 3
31 3
32 3
33 2
34 4
35 2
36 6
37 2
38 1
40 3
42 1
45 1
46 1
52 2
Give an example of something having these distribution shapes: (a) bimodal- Distribution of male and female hair length in a company
, (b) approximately...

...Week4 Practice Problems
11. List the five steps of hypothesis testing, and explain the procedure and logic of each
Step 1: During this step of hypothesis testing, the query is stated again as a research theory and a null theory regarding the populations. The null and research hypothesizes are the opposites of each other. This step is necessary because it explains the theory and recognizes the populations, which will be worked throughout the study.
Step 2: During this second step, the characteristics of the comparison distribution is determined. In instances that the null theory is correct, the comparison distribution is compared to the score depending on the sample’s outcomes.
Step 3: During this third step, the cutoff sample score on the comparison distribution at which the null hypothesis should be rejected is determined (Aron, Aron, and Coups, 2009). Here a researcher rejects the null hypothesis if the point of the cutoff sample score reaches or exceeds the sample score. If the null hypothesis is true the Z score is set as a score, which is actually unlikely.
Step 4: This is the step in which the test’s sample results are gathered and the sample’s score on the comparison distribution is determined.
Step 5: Lastly, this is when the decision whether the null hypothesis is rejected or not is made. A researcher either declares the test invalid or rejects the null hypothesis by comparing the cut off z score to the...

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Reflection
Thomas Galvan
Gurpreet Gill
John Williams
QNT / 351
Mark Bell
July 29, 2015
Statistics refers to the use of numerical information in everyday life to calculate facts and figures in limitless circumstances. In addition, statistics refers to the scientific collecting, classifying, summarizing, organizing, analyzing, and interpreting numerical data. The steps in testing a research hypothesis, to compare the means of two or more groups, and to calculate the correlation between two variables.
Testing a Research Hypothesis
The hypothesis process has five steps. It is necessary to follow these steps to research any issue or question. Not following the steps or conducting them out of order could result in poor results. The purpose of testing a research hypothesis is to prove or disprove the research question. ("Research Hypothesis", 2015). The five steps involve stating the research question, clarifying null or alternative hypothesis, experimentation and calculating, evaluation of experimentation, and the conclusion of the results. The first step consists of stating the research question. The second step consists of defining the null and alternative hypotheses as well as selecting a level of significance. The test will be usually done with a significance level of α = 0.05, which is a typical value used in business-related hypothesis testing. ("Statistical Hypotheses", 2014). The third step corresponds to identifying the appropriate test statistic. This is done...

...University of Phoenix Material
Week Two Practice Problems
Prepare a written response to the following questions.
Chapter 2
12. For the following scores, find the mean, median, sum of squared deviations, variance, and standard deviation:
1,112; 1,245; 1,361; 1,372; 1,472
Mean is 1312
Median is 1361
Sum of squared deviations is 76089.2
Variance is 15218
Standard deviation is 123.361
16. A psychologist interested in political behavior measured the square footage of the desks in the official office for four U.S. governors and of four chief executive officers (CEOs) of major U.S. corporations. The figures for the governors were 44, 36, 52, and 40 square feet. The figures for the CEOs were 32, 60, 48, 36 square feet.
a. Figure the means and standard deviations for the governors and CEOs.
Governors: Mean 43, Standard deviation 6.83
CEOs: Mean 44, Standard deviation 12.65
b. Explain, to a person who has never had a course in statistics, what you have done.
What you do is find the spread of data and the average measurements of the desks for both the CEO’s and the governors.
c. Note the waus in which the means and standard deviations differ, and speculate on the possible meaning of these differences, presuming that they are representative of U.S. governors and large corporations’ CEOs in general.
The means in both cases are the same. The range for the CEO’s is double the size of the governors measurments speculating that they have larger desk while...

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MAT 540 Week4 Homework
Chapter 15 problems
2. The manager of the Carpet City outlet needs to make an accurate forecast of the demand for SoftShag carpet (its biggest seller).If the manager does not order enough carpet from the carpet mill,customers will buy their carpet from one of Carpet City’s many competitors. The manager has collected the following demand data for the past 8 months:
Month Demand for Soft Shag Carpet (1,000 yd.)
1 8
2 12
3 7
4 9
5 15
6 11
7 10
8 12
a. Compute a 3-month moving average forecast for months 4 through 9.
b. Compute a weighted 3-month moving average forecast for months 4 through 9. Assign weights of 0.55,0.33,and 0.12 to the months in sequence, starting with the most recent month.
c. Compare the two forecasts by using MAD. Which forecast appears to be more accurate?
6. The manager of the Petroco Service Station wants to forecast the demand for unleaded gasoline nextmonth so that the proper number ofgallons can be ordered from the distributor.The owner has accumulated the following data on demand for unleaded gasoline from sales during the past 10 months:
Month Gasoline Demanded (gal.)
October 800
November 725
December 630
January 500
February 645
March 690
April 730
May 810
June 1,200
July 980
a. Compute an exponentially smoothed forecast,...

...Strategic Choice and Evaluation
In today’s businesses it is important that companies evaluate all areas of operation to ensure their success. Each area of a business should implement some type of strategic plan that sets the platform of how the company will be successful. Innovative ideas are an important part of making certain the company remains a leader in the market. Being innovative requires Progressive Insurance to strategize in all departments. In order to meet objectives for the Progressive Insurance evaluation of different strategies will be analyzed. Value disciplines, generic strategies, and grand strategies will be analyzed to determine which is best for the success of Progressive.
Value Discipline
Value discipline is the belief that a company must strategize while “delivering superior customer value through three value disciplines: operational excellence, customer intimacy and product leadership” (Pearce & Robinson, p.198). Value discipline is mostly important to valuing the customers that utilize the company. One discipline that is expressed is operation excellence. Operational excellence are strategies that focus on distribution of products and services. Companies who utilize this discipline main focus is to reduce overhead cost and reducing internal expenses to focus on efficiency and reliability (Pearce & Robinson, 2013). Another value discipline is customer intimacy. Customer intimacy formats products and services to meet the needs of the...

...ECE 430 Reflective Journal Template
Please remember to use the chosen font color for each weekWeek 1 –BLACK Week 2 – BLUE Week 3 – GREEN Week4 - PURPLE
Program Comprehensive Exam Main Topic
Program Comprehensive Exam Sub-Topics
Course Reflection Task
Analyze how the components of the case study are aligned to the Main Topics and Sub-Topics by providing a written summary of your reflections.
Program Reflection Task
Synthesize the learning from the case study, knowledge of main topics and program learning by providing a written summary of your reflections.
ANALYZE
To break down big ideas for the purpose of understanding smaller, specific concepts.
SYNTHESIZE
To combine smaller, specific concepts for the purpose of understanding the big idea.
Learning Differences
•Special Needs Populations
*Impairments
*Disorders/Disabilities
*Exceptional Students
Mrs. Ashland has several students who require additional assistance throughout the day. Mrs. Ashland has made several documentations on each of these children
Mrs. Ashland recognizes the students that need some extra assistance and seems to be working with them and their parents as available.
It is important to know where each child is academically and socially and help them to reach the next level by offering new experiences.
I think that Mrs. Ashland needs to work on communicating with parents in other ways because the way...

...Question 1 of 4: |
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Interview an entrepreneur. This entrepreneur could be one who was able to raise finance for the venture or one who was unable to raise finance for the venture. Write a paper summarizing:
a) The various efforts put in by the entrepreneur in raising the funds
b) The entrepreneur's experience of the process of raising finance
c) An analysis of the factors that made the investor or financial institution invest or not invest in the venture | |
Question 2 of 4: |
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Create a design and outline of the business plan to be completed in week 6. Note: The design of the business plan should follow the same criteria expected for the final project and should only be a "skeleton" of the business plan. | |
Question 3 of 4: |
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Create an executive summary for the business plan developed in Assignment 2. | |
Question 4 of 4: |
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Prepare a script for an elevator pitch (not more than five minutes long) for the business plan developed in Assignment 3. | |
DQ 1:
A business plan should concentrate on the content rather than the style and presentation. Give your views.
DQ 2:
A business plan for a venture operating in a service industry is different from that of a venture operating in a manufacturing industry. Give your views.
DQ 3:
Entrepreneurs themselves are often the best selling agents of a venture to potential investors....