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Descriptive Statistics


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

XY Scattergraph using Microsoft Excel

I need an XY scatter graph using Microsoft Excel that has 30 for a maximum y axis and 4 for a maximum X axis. The numbers on the x-axis are offset with the numbers 0, 2, and 4 on the lines. The entire graph must have 36 individual cells. The graph needs to show all of the numbers 0-4, but only 0, 2, and 4 are directly on a li

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

Probabilities for an iid sample

Suppose X1,X2,...,X120 is an iid sample taken from a population with mean (mu)=20 and standard deviation (sigma) = 10. a) Can you find P(X1 > 22)? If so find it, if not state reason. b) Find P(X(bar) > 22)

Capital in Transaction

1. What types of sources of capital can be used in a transaction? Pick a single source of capital and describe why/under what circumstance you would use this type source.

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

Value Function for Attributes

5. Suppose a customer has a two-attribute value function for cars: cost and quality. Cost can range from $5,000 to $10,000 and quality can range from 0 to 10 (a higher score is better). Over these ranges, these two objectives are equally important to the customer. The value functions are both linear. Which car would this cu


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

Linear Programming and Sensitivity Analysis Using Solver

Sky Queen (SQ) has hired you to develop its production plan for the next 12 months (September - August.) The objective is to minimize total cost. SQ can hire and fire employees but this action incurs a hiring cost of $600 per employee and a firing cost of $950 per employee. Other relevant costs are: $8.00 per unit produced in

Four multi-part questions

Please see Excel file. a. Compute the mean and standard deviation for the sample data b. Using the mean and standard deviation computed in part 9a) as estimates of the mean and standard deviation of salary for the population of benefits managers with an annual salary between $55,000 and $71,000 c. Develop a histogram f