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Descriptive Statistics

Central tendency measures: average level of reading ability

A researcher tested the reading ability of two groups of primary care patients. The scores on the test range from 1 to 9 with 9 indicating a high degree of reading ability and 1 very limited reading ability. The researcher is interested in knowing the average level of reading ability for each group separately and for the sample

Descriptive Statistics Consultant

A statistical consultant was retained by a linen supplier to analyze a survey of hospital purchasing managers. After looking at the data, she realized that the survey had missed several key geographic areas and included some that were outside the target region. Some survey questions were ambiguous. Some respondents failed to ans

Path- Distance (Shortest Route)

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

Feedback on descriptive statistics

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

Sampling Methods, Frequency Distribution, Stem & Leaf Plot

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

Descriptive Statistics Example Questions

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

Organizational Development and the Role of a Consultant

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

Females in Language Arts Programs

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

Analysis project

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

Quantitative reasoning and descriptive statistics

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

Measures of Central Tendency for Experienced vs. Educated

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

Statistics: Average distance walked; Severity of facial wrinkles in middle age

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

Descriptive Statistics: Tea-Bag-Filling Process

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

Descriptive Statistics

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

Multiple Regression Analysis & Scatter Plots in Excel - Traffic Fatalities

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

Break-Even Analysis

The College of Business at Tech is planning to begin an online MBA program. The initial start-up cost for computing equipment, facilities, course development is $350,000. The college plans to charge tuition of $18,000 per student per year. However, the university administration will charge the college $12,000 per student for the

Statistics: Types of Data and Frequency Distribution

The following shopping time (in minutes) was recorded for 17 customers who visited a local clothing store. Shopping Time (minutes): 26, 23, 44, 41, 38, 35, 31, 28, 25, 22, 43, 31, 31, 27, 27, 27, 24 Answer the following Questions: A) Is this a raw data or classified data? ____________________ B) Is this a categ

Huntington National Bank: Confidence levels for use ATM machines

Huntington National Bank, like most other large banks, found that using automatic teller machines (ATMs) reduces the cost of routine bank transactions. Huntington installed an ATM in the corporate offices of Fun Toy Company. The ATM is for the exclusive use of Fun's 1,000 employees. After several months of operation, a sample of

Regression Analysis

Based on the regression analysis performed: 1/ From the scatter plot of calls offered and t variable which is true. a. an increase in t variable leads to an increase in calls offered. d. there is a strong linear relationship between the two variables 2/ Calculate the correlation coefficient between calls offered and time v


Young Professional magazine was developed for a target audience of recent college graduates who are in their first 10 years in a business career. In its two years of publication the magazine has been fairly successful. Now the publisher is interested in expanding the magazines advertising base. Potential advertisers continually

Identify types of errors in procedures, and how to deal

See attached file with the following questions at the end. 1. For each team, identify all of the types of error that were likely introduced by the data collection process. Discuss why you believe particular procedures produced each type of error you identify. 2. What could have been done to prevent/minimize each type of er