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Descriptive Statistics

Frequency Distribution, Mean and Standard Deviation

Please see attached file for full problem description. Use the data set collected in a) to do the following. 1. Group the data into at least 10 different classes and create a frequency distribution table for the data set, and graph the histogram of the data set; Make an educated guess about the mean, standard deviation, an

Optimization Modeling - Determine how Woodco can maximize its revenue.

Woodco manufactures tables and chairs. Each table and chair must be made entirely out of oak or entirely out of pine. A total of 150 board feet of oak and 210 board feet of pine are available. A table requires either 17 board feet of oak or 30 board feet of pine, and a chair requires either 5 board feet of oak or 13 board fee

How should you restructure you variable and fixed costs within your firm?

You are working on an analysis of your company's current cost structure reviewing the various fixed and variable costs within your firm. Your objective is to maximize your firm's profit. In reviewing your current sales you are confident that you will reach a sales level of 40,000 units. Your fixed costs are presently $400,000

Central Limit Theorem/Sampling Distribution

See Excel file to answer the following questions. A. Generate a random frequency distribution of per capita personal income B. From the frequency distribution, select two small samples (sample size of 4) and two large samples (sample size of 40), and compare the means and the standard deviations.

Estimating Risk and Association

Jone and associates carried out a study of sudden unexpected death in women. Data on smoking history are shown in the table: Controls Smoking 1+ Smoking <1 Pack/d

Estimating risk and Association

Of 2,872 persons who had received radiation treatment in childhood because of an enlarged thymus, cancer of the thyroid developed in 24 and a benign thyroid tumor developed in 52. A comparison group consisted of 5,055 children who had received no such treatment (brothers and sisters of the children who had received radiation tre

Confounding: Causal Inferences

Describe how individual matching, stratification, group matching and adjustment control confounding? The review questions included the answers, however the textbook does not do a great job in explaining how the above approaches control confounding. Thank you...

Variables

A section of output from The Management Scientist is shown here. Variable Lower Limit Current Value Upper Limit 1 60 100 120 What will happen to the solution if the objective function co

Mean and Standard Deviation

The claim has been made that the mean and the standard deviation are the most important measures of location and dispersion in statistics. Some commentators claim that these measures are more important than other measures such as median, mode or mean deviation. QUESTIONS: Why the emphasis on mean and standard deviation ra

Prevalence rate and incidence rate for Epidemology Practice Exercise

The exercise problem the following information to figure prevalence and incidence rate: Population of the city of Atlantis on March 30th, 2003 = 183,000. Number of new cases of tuberculosis occurring between january 1st and June 30th, 1003 = 26 Number of active TB cases according to the city register on June 30th, 2003 =

Statistics True or False

Part I. T/F & Multiple Choice Questions Questions 1- 5 Answer True or False. 1. The field of statistics can be roughly subdivided into two areas: descriptive statistics and probability. ______ 2. A company employs 950 individuals. To ascertain how the employees feel regarding a pension plan, 105 of the emplo

Calculating Reliability Figures

The U.S. Army is about to award a contract for an electrical switching device to Integrated Switches Corporation (ICS) of Phoenix, Arizona. The switch will be used on the next version of infantry carrier vehicles. One obstacle that remains to be resolved, However, is that the Army requires a reliability of 0.995 for the device

Frequency, variation and distrinbution

See attached file for full problem description. The per capita personal income by state (including the District Columbia), in thousands of dollars, follows. 1. Organize these data into a frequency distribution. 2. What is a "typical" per capita income for a state? 3. How much variation in the income data is there? 4. Is

Descriptive and Inferential Statistics

What are the main differences between descriptive and inferential statistics? Give examples of each. When would random sampling not be the best approach to sample selection? Give an example.

Within Sample Sum of Squares

SS within samples is a sum of squares representing the variation that is assumed to be common to all the populations being considered. Is this true? Explain

Test the claim that the samples come from populations with the same mean

1. Test the claim that the samples come from populations with the same mean. Assume that the populations are normally distributed with the same variance. Given the sample data below, test the claim that the populations have the same mean. Use a significance level of 0.05. Brand A Brand B Brand C n = 10 n = 10 n = 10 x-bar

Statistics Problem

1. The US Energy Information Administration reports figures on retail gasoline prices. Data are obtained by sampling 10,000 gasoline service stations from a total of more than 185000. For the 10,000 stations sampled in June 2003, the mean price per gallon for unleaded regular gasoline was $1.49. The mean price given here is a p

New York City Dry Cleaners - Statistic Problem

3. When John Zoidberg purchased the New New York City Dry Cleaners, he thought that because of its good location near several high-income neighborhoods, he would easily generate business if he improved the building's physical appearance. Therefore, he invested much his cash reserves in remodeling the exterior and interior of th

Simplified application of Descriptive Statistics and analysis

I am looking for the best simplified method for applying "Descriptive Statistics" to analysis of these 3 types of questions. This is not a statistics class but a portion of an assigned graduate level assignment. I need to determine the best statistical method to use and recommendations for graphing which will be inserted into th

Experiment design, results, and interpretation

A completely randomized (CRD) experiment was conducted in a glasshouse to test whether mature sugar beet roots are heavier when using a new fertilizer (A). Twenty pots of equal size were filled with the same compost and randomly placed on the bench in two parallel rows as shown below. To ten of pots the old fertilizer (B) was ad

Decreasing marginal utility of money

6. A widely-used value function to represent the value of total assets to an individual is the natural logarithm of the assets; this means that the value of total assets of amount X is proportional to ln (X) (the natural logarithm of X). This value function is sometimes referred to in economics as the "decreasing marginal utili

You are assisting both Production departments in analyzing transportation capacity. Data has been collected on truck capacity (# of bags), truck weight, and truck age (in years) for the entire fleet. You have been asked to provide the major summary statistics for this information and you realize you will need to provide explanation of terminology as well.

You are assisting both Production departments in analyzing transportation capacity. Data has been collected on truck capacity (# of bags), truck weight, and truck age (in years) for the entire fleet. You have been asked to provide the major summary statistics for this information and you realize you will need to provide explanat

Statistic Questions

1. The national average of women's times in the 1 mile run is 7.5 minutes with a standard deviation of 1.2 minutes. The male national average is 6.75 minutes with a standard deviation of 0.8 minutes. Your Aunt and Uncle decide to race the mile. His time is 8.35 minutes while hers is 9.3 minutes. Using the concept of z-scor

Inventory

Martin-Pullin Bicycle Corp. (MPBC), located in Dallas, is a wholesale distributor of bicycles and bicycle parts. Formed in 1981 by cousins Ray martin and Jim Pullin, the firm's primary retail outlets are located within a 400-mile radius of the distribution center. Theses retail outlets receive the order from Martin-Pullin with

Descriptive Statistics: Means and Standard Deviations

25. Consider a sample with data values of 10, 20, 12, 17, and 16. Compute the z-score for each of the five observations. 57. A survey of subscribers to Fortune magazine asked the following question: "How many of the last four issues have you read?" Suppose that the following frequency distribution summarizes 500 response

Question about Descriptive Statistics and Graphs

1. A survey on 25 people on how they got news resulted in the following data. M M N M R N N R T T R N T M R R M T N M R N R N T a) Construct a frequency distribution for the data (N = newspaper, T = television, R = radio, M = Magazine) b) Construct a pie graph for the data and analyze the results. 2. Below are