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# Descriptive Statistics

### Correlation coefficient and descriptive statistics

Give a brief definition and an example of the following: a. Descriptive Statistics b. Inferential Statistics What does the correlation coefficient r describe? What about r squared?

### Histograms and frequency polygons: Graphical presentations

Explain why histograms and frequency polygons are used in business statistics. A graphical presentation may accomplish all but which of the following objectives? a) Illustrate the amount of variation in the data. b) Illustrate approximately where the mean is. c) Allow comparison with similar data. d) Wi

Please assist regarding an index based on how people feel about the economy. In this case, the base was 1985 and set at 100. Thus, if the index was at 57.2 in May 2008, and in October 1992 the index was at 54.6, are people feeling better or worse in 2008 than they did in 1992? If the index was at 62.8 in April 2008, what does th

### Strategic alignment model

Please see the following article: Henderson, J. C., & Venkatraman, N. (1993). Strategic alignment: Leveraging information technology for transforming organizations. IBM systems journal, 32(1), 4-16. Can the strategic alignment model in the Henderson & Venkatraman article address both the internal and external IT domains?

### Penultimate Support Systems: Gantt Chart using Johnson's Rule

Penultimate Support Systems makes fairly good speaker and equipment support stands for music groups. The assembly process involves two operations: (1) fabrication, or cutting aluminum tubing to the correct lengths, and (2) assembly, with purchased fasteners and injection-molded plastic parts. Set-up time for assembly is negligib

### AutoWrecks hypothesis: difference in this year's moving violation distribution

AutoWrecks, Inc. sells auto insurance. AutoWrecks keeps close tabs on its customers' driving records, updating its rates according to the trends indicated by these records. AutoWrecks' records indicate that, in a "typical" year, roughly 70% of the company's customers do not commit a moving violation, 10% commit exactly one movin

### Exponential Smoothing: August forecast income

What is the August Forecast income? Assuming initail forecast for February is \$65,000 and the smoothing constant is a=0.1. Executive income: February 70.0 March 68.5 April 64.8 MAy 71.7 June 71.3 July 72.8

### Red Rose Club: Calculate Break Even Point in sales

S7.25 As a prospective owner of a club known as the Red Rose, you are interested in determining the volume of sales dollars necessary for the coming year to reach the break-even point. You have decided to break down the sales for the club into four categories, they are as follows: Category Estimated Sales Cost per unit Sale

### Ski Resorts of Vermont: level of measurement in the table

Ski Resorts of Vermont, Inc. is considering a merger with Gulf Shores, Inc. of Alabama. The board of directors surveyed 50 stockholders concerning their position on the merger. Number of share held Favor Oppose Undecided Total Under 200

### Summation of indexed data for list of 14 measurements

Summation of indexed data The following is a list of 14 measurements: 51, -15, -19, 56, 63, 54, 0, 85, 18, -37, 33, 58, -94, -45 Suppose that these 14 measurements are respectively labeled . (Thus, is labeled , is labeled , and so on.) Find .

### 18 Problems in Statistics

1. a.11 10 8 4 6 7 11 6 11 7 b.13 23 15 13 18 13 15 14 20 20 18 17 20 13 i. Find the range, mean, variance, and standard deviation of the population data set. ii. Without calculating, which data set has the greatest sample standard deviation? Which has the least sample standard deviation? Explain your reasoning. iii.

### Is the data nominal ratio, interval, ordinal

(NAME OF SURVEY) To help get the public's opinion regarding containment efforts in the Gulf of Mexico, please complete this survey and return it to July 15th, 2010 . Section One Yes No Maybe Not Sure N/A Please select one answer for each question below: Is there an oil spill in the Gulf of Mexico? Did you know about

### Statistical Terms and Definitions Matching

Terms and Definitions matching ___ Statistics ___ Discrete variable ___ Statistics ___ Continuous variable ___ Population ___ Qualitative data ___ Popu

### On average, Women are now 57% of the students of higher education.

On average, Women are now 57% of the student body nation-wide on campuses of higher education. What do you think is the reason behind this statistic?

### Converting Standard Scores from One Scale to Another

Why it is possible to easily convert standard scores from one scale to another? The mean and standard deviation of each of the transformed scores and the theoretical rationale for their equivalency.

### Processing Time

Consider a worker-paced line with three process steps, each of which is staffed with one worker. The sequence of the three steps does not matter for the completion of the product. Currently, the three steps are operated in the following sequence (numbers indicate processing time of each step): Step A 3min/unit Step B 4m

### Supply Chain Management and Reorder Points

You own a factory in China which makes hiking shoes and you are signing a contract with Hikee Shoe company to supply them with shoes that they will market every year in the U.S. Market. Because hiking shoe demand is highly seasonal, and also the models change every year, Hikee orders every model just once and you supply the whol

### Survey Design and Describing Data

Hi, I hope you will be able to help me to understand what I'm not comprehending. Thanks much. What are some examples of descriptive statistics? Why are they used in research? How can you avoid bias when selecting samples for human services research? Text books I am using--- Rosnow, R. L., & Rosenthal, R. (2008). Beg

### Statistics: distribution, correlation coefficient, variables, regression line

1. For a particular sample of 50 scores on a psychology exam, the following results were obtained. First quartile = 44 Third quartile = 68 Standard deviation = 9 Range = 55 Mean = 51 Median = 54 Mode = 71 Midrange = 64 Answer each of the following; show all work. - What score was earned by more students than

### Statistics: Little's Law to determine lead time for quote from custom publishing house

A quoting department for a custom publishing house can complete 4 quotes per day, and there are 20 quotes in various stages in the department. Applying Little's Law, the current lead time for a quote is how many days?

### Theory Approach to Problems

In your organization's management development program, there was a heated discussion between people who claimed that theory is impractical and not effective, and others who claimed that effective theory is the most practical approach to problems. What position would you take and why?

### Cross tabulations using minitab

Prepare one way tabulations of all variables using minitab. In the menu line at the top of the screen click on Stat and drag the cursor to tables. Click on tally individual variables. select all the variables in the data set by marking their names in the dialog box and clicking select. Make sure at least count is marked u

### Job Satisfaction Survey: Statistical Analysis Report

See attached file. The data set for our course is a sample of a survey conducted on the population of the American Intellectual Union (AIU). It is available via the following link: Excel 2007 DataSet with DataSet Key which contains the following nine sections of data that will be used throughout our course: (1) Gender (2)

### Examining Qualitative and Quantitative Data

See attached data set. The data set for our course is a sample of a survey conducted on the population of the American Intellectual Union (AIU). It is available via the following link: Excel 2007 DataSet with DataSet Key which contains the following nine sections of data that will be used throughout our course: (1) Gender

### Finding the Break-Even Point: Example Problem

There is a fixed cost of \$50,000 to start a production process. Once the process has begun, the variable cost per unit is \$25. The revenue per unit is projected to be \$45. Find the break-even point.

### A Statistical Analysis Report on Job Satisfaction Survey

See attached data file. The data set for our course is a sample of a survey conducted on the population of the American Intellectual Union (AIU). (See attachment for Excel 2007 DataSet with DataSet Key which contains the following nine sections of data that will be used throughout our course) Below are the nine sections:

### Descriptive Statistics in Research

I do not understand this research and statistics at all but I'm starting to learn about the different types of research and about reliability and validity. I would appreciate any help you can give. Thank you so much! What are some examples of descriptive statistics? Why are they used in research? List the three measure

### MLB salaries: Data analysis using descriptive statistics (Excel)

Please see attachment This research could affect the players of Major League Baseball (MLB) and the fans. The teams that have a lower salary have a lower win rate per year this affects there draft pick they cannot afford well-known plays with high batting averages. These teams have to pick medioka players during the draft, ca

### Histogram, Cumulative Graph, Percentile and Quartile: Example

The final examination of a course requires an essay. The number of pages from a sample of 25 students were collected. The data are: 5 8 9 3 12 8 5 7 3 3 8 9 5 2 7 12 9 6 3 8 7 10 9 12 7 a) Construct a histogram. Describe its shape. b) Draw a cumulative graph c) Calculate the 65th percentile d) Calculate the upper quarti

### Understanding Inputting Data in SPSS

I need help with inputting data into SPSS and running some analysis