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.
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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
If a random sample of 10 people found that 9 were pro-life (that is, 90 percent), while another random sample of 1,000 people from the same population found that 550 were pro-life (that is, 55 percent), which would you find more significant? Why?
A quality characteristic of interest for a tea-bag-filling process is the weight of the tea in the individual bags. If the bags are under filled, two problems arise. First, customers may not be able to brew the tea to be as strong as they wish. Second, the company may be in violation of the truth-in-labeling laws. In this ex
1. When using linear regression analysis what are we attempting to measure? Explain how this measurement can help in a business decision. 2. Go to the following website and participate in the interactive problems on Histograms and then post feedback. http://www.cals.ncsu.edu/gn/ex/samphist.html
1. US housing prices reached their peak in July of 2006. The following data shows the ratio of the prices reported in a recent month to the July 2006 figure. These are to be used to represent typical amounts of decline from that peak for 20 cities. Phoenix Los Angeles San Diego Denver Washington Miami Tampa Atlanta
A tire company is considering a tire replacement program.They have agreed to replace any tire that fails with a life in the bottom 10% of the population. For a given population of tires, the life is normally distributed with a mean of 27 months and a standard deviation of 3.8 months. What will be the maximum life of a tire to
A study was conducted on the weight of cereal in ounces placed in the package. The mean was found to be 12.05 ounces with a standard deviation on 0.17 ounces. Assuming the weight of cereal is normally distributed, determine the likelihood that a package will contain more than 12.2 ounces? Round your final answer to four
List your reference 1. In your own words, define epistemology and ontology. Why are these concepts important to the study of research? How might the concepts influence your future research? 2. What are descriptive statistics? What are inferential statistics? How are each used in quantitative studies?
The average time T a customer waits to get his food cooked is related to the average number of orders N by the relation T = 1 + N^2. What is the maximal order arrival rate lamda* that the cook can sustain?
Which of the following is true about the standard error of estimate? Choose the right answer: a. It is a measure of the accuracy of the prediction b. It is based on squared vertical deviations between Y and Y` c. It cannot be negative
A group of legislators wanted to look at factors that affect the number of traffic fatalities. They collected some data for 1994 from the National Transportation Safety Board on the number of fatalities for 50 states and the District of Columbia (DC), the number of licensed drivers, the number of registered vehicles, and the num
Pete's Pharmacy Inc operates a regional chain of 120 pharmacies. Each pharmacy's floor floor plan includes a greeting card department which is relatively isolated. Sandra Royo, Marketing Manager, feels that the level of lighting in the greeting card department may affect sales in that department. She chooses four levels of light