Why is it useful to know something about the shape of a set of numbers (a "dataset")? What is an example of a variable that would measured in such a way that we could look at the shape of its dataset's distribution of measurements?
What are the main differences between descriptive and inferential statistics? What is each used to accomplish?
Bond Rating Who are the rating services and what are their bond ratings? Based on the ratings, what are the differences between investment grade bonds and junk bonds? What do the ratings mean and how important are the ratings when buying a bond? When would buy an investment grade bond? When would you buy a junk bond?
Consider the following shortest-route problem involving seven cities. The distances between the cities are given below. Draw the network model for this problem and formulate the LP for finding the shortest route from City 1 to City 7 Path Distance 1 to 2 6 1 to 3 10 1 to 4 7 2 to 3
The temperature in December in Buffalo , New York , is often below 40 degrees Fahrenheit (4 degrees Celsius). Not surprisingly, when the National League Buffalo Bills play at home in December, coffee is a popular item at the concession stand. The concession manager would like to acquire more information so he can manage inventories more efficiently. The number of cups of coffee sold during 50 games played in December in Buffalo were recorded. The results are in file Xr04-84.
The temperature in December in Buffalo , New York , is often below 40 degrees Fahrenheit (4 degrees Celsius). Not surprisingly, when the National League Buffalo Bills play at home in December, coffee is a popular item at the concession stand. The concession manager would like to acquire more information so he can manage inventor
The symphony sells raffle tickets each year to raise money. Assume they sell 2000 tickets and the tickets cost $100 each. The top prize is a $50,000 car and the second prize is a $5,000 gift certificate from a jewelry store and the third prize is a $1,000 shopping spree at an area mall. Find the expected value of buying a raffle
1. What are some examples of descriptive statistics? Why are they used in research? What is a confidence interval? 2. How can you avoid bias when selecting samples for human services research? List the three measures of variability and provide one example of each. If in a response team, what may these measures of variab
What is the ROP? How is it determined?
Describe briefly the steps used to develop a forecasting system.
See attached file graphs. 1. Given the situation described, identify the type of sampling involved. At a newspaper office, staffers are classified by the department in which they work. Then random samples from each department are taken. a. random sampling b. systematic sampling c. convenience sampling
What are some other data points that we can collect for moms who deliver? I'll start us out with a couple of examples: * Weeks of gestation at time of delivery * How many visitors the patient had * Weight of baby at birth
The following data lists the average monthly snowfall for January in 15 cities around the US: 42 45 8 18 45 15 31 46 3 33 2 6 32 47 36 Find the mean, variance, and standard deviation. Please show all of your work.
Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Class Frequency 36-38 18 39-41 7 42-44 12 45-47 22 48-50 13
What factors contribute to a skewed distribution? Provide an example, not from the text, that might have variables that would skew the data and graph of data points. Note: Please see your text on what skewed (left/right) graphs mean for the data. It does not mean that the data was made up or collected incorrectly.
Use excel to compute the descriptive statistic for the following data set: 25,45,73,16,34,98,34,45,26,2,56,97,12,445,23,63,110,12,17, and 41.
What are some conditions under which business decisions are made using subjective probability concepts? Give examples of subjective probability. Give three different examples of where you might apply descriptive statistics in a workplace. Explain why each is appropriate for the data you are describing. Where might you use
See attached data file. Compute the standard deviation of the average annual household income levels of citizens from selected U.S. metropolitan areas in the file P03_06.xlsx. Is it appropriate to apply the empirical rules for these data? Explain.
What are the main differences between descriptive and inferential statistics? Provide an example of either type of statistics either from a recent study you heard about or a made up study you'd be interested in learning about.
Descriptive Statistics: Tell a story from a dataset using descriptive statistics, confidence intervals, and hypothesis tests.
I have no idea how to work confidence intervals and apply the hypothesis tests. Help would be greatly appreciated. I need help creating a question and applying the data to it. Any of the data sheets posted can be used. Thank you! --------------------------------------------------------- See attached files. This may be
What is the role of an OD (Organizational Development) consultant as a change leader? What are the core competencies of an OD professional? Is their any value in reviewing theoretical literature in OD that can provide a theoretical framework or is it purely by experiences? What relationship, if any, exists between theory and p
Please help with the following problem. What percentage of the grand total of students are females in the Lang Arts program? How would you interpret the relationship between gender and majors in this graph? List the percentages of students in each major area as compared to the grand total. degree
1. Analyze that data set: For this part, if you are male use the male variable; if you are female use the female variable. a. Determine the center of the data using the mean, mode, and median. b. Determine measures of variation (range, standard deviation and variance). c. Determine the quartiles. d. Determine the IQR (Inn
Please submit an annotated bibliography of 5 articles, website materials, or book chapters you have surveyed while searching for sources related to your chosen area of research. For at least one of your sources: Describe the source's use of descriptive statistical measures you learned about in this module. Describe the
Calculate the measures of central tendency, dispersion, and skew for your data. Prepare you paper examining the data you have collected, and drawing conclusions based on your findings. In your paper, be sure to include the following: a. Data analysis using descriptive statistics 1) Calculate the measures of centra
1. A researcher studies the average distance that 130 people who are living in U.S. urban areas walk each week: What is the size of the sample? Identify the population. 2. Is the "average" calculated in #1 a descriptive statistic or an inferential statistic if it is used to describe the 130 people studied? 3. Referenci
See attached file. I need help calculating medical expenses that have been paid for Jane Doe (the plaintiff in a personal injury case). Using Excel. I have attached medical invoices for 5 companies that have paid expenses for Jane Doe. Jefferson has 2-pages of expenses paid Shannon has 1-page of expenses paid Bradley
1. PTY Company has experienced the following numbers of losses in the past 10 years: 3, 4, 3, 3, 1, 0, 2, 2, 3, 3. Calculate the mean, median, mode, variance, standard deviation, and coefficient of variation for this loss experience. 2. MDC Corporation's losses are assumed to be distributed normally, with a mean of $10,000 an
See attached data file. In each of the assignments in this course, you will be dealing with the following scenario: American Intellectual Union (AIU) has assembled a team of researchers in the United States and around the world to study job satisfaction. Congratulations, you have been selected to participate in this massive g
Five college engineering students are choosing specialized fields of engineering to study. Each student is allowed to select one field. The available fields are Electrical Engineering (EE), Mechanical Engineering (ME), and Computer Engineering (CE). If the second student does not meet the requirements for ME and the third st
You run a small Internet business and are concerned about customer support service levels on the Help Desk. You want to know how many calls per day are handled by your help desk staff. You collect the data at left over a 90-day period. Use appropriate descriptive statistics to make sense of this data. Use an appropriate grap