A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sample and analyzed with the following results: X = $50.50 S2 and 400. Assuming the distribution of the amount spent o
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
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
ABC Corporation of California publishes a variety of statistics, including the number of individuals who got a new job during the past 12 months and the mean length of time the individuals have been on the job. The Statistical Analysis Department of ABC Corporation reported that the mean length of time of newly employed individu
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
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
Mary claims that the range, standard deviation and variance are all measures of dispersion. John adds to Mary's claim by stating that the coefficient of variation is a measure of relative dispersion. Do you agree with both Mary and John? Why?
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
Would like to be shown how the attached questions are solved. I prefer workings and explanations as that is a better way of learning and understanding how the problems are solved.
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
A book inventory record contains the following information: a. title: More Mysteries b. Author: Roger Morimer c. Date of pub: 1998 d. List price: 25.00 e. Number in stock: 6 For the information a to e. List the highest level of measurement as ratio, interval, ordinal, or nominal
If the random variable T has p.d.f. given by f_T(f) = ce^-ct for t >= 0, c > 0, calculate: the complete expectation for life E[T], var(T), median(T), and the mode of the distribution of T.
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
With more then a million teachers set to retire we are seeing a record number of turnovers in the teaching profession. In a time where student enrollments across America are increasing at a rapid place experts predict that we will need more then two million teachers over the next decade. Clearly define the dependent and indepen
The Rolling Creek Textile Mill produces denim. The fixed monthly cost is $21,000, and the variable cost per yard of denim is $0.45. The mill sells a yard of denim for $1.30. If the maximum operating capacity of the Rolling Creek Textile Mill described in problem 3 is 25,000 yards of denim per month, determine the break even volu
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 underfilled, 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 exa
The data set for our course is available via the following links: DataSet and DataSet Key contain the following eight sections of data that will be used throughout our course: (1) Gender (2) Age (3) Department (4) Position (5) Tenure (6) Overall Job Satisfaction (7) Intrinsic Job Satisfaction - Satisfaction with the actual pe
To examine the continuity and discontinuity in the criminal careers of 7,453 females of low socio-economic status, Tracy and Kempf-Leonard (1996) examined whether these females were nonoffenders, one-time offenders, recidivist offenders, or chronic offenders as juveniles and whether these females became nonoffenders, one-time of
Deliverable 1: Descriptive Statistics (10 points) Our main emphasis in the course is "inferential" statistics which means taking samples and drawing an inference or conclusions about the population. Access raw data or a database from government, business, health, and similar official Web sites pertaining to your area of i
How many quarters must we randomly select and weigh if we want to be 99% confident that the sample mean is within 0.025 g of the true population mean for all quarters? Based on results from a sample of quarters, we can estimate the population standard deviation as 0.068 g.
Describe descriptive data analysis?
Imagine a team of researchers was going to study "you." They would be gathering data from a typical day at your job, your home life, and school. When the data compilation is finished the researchers would conduct an analysis. What would a distribution or a bell curve look like from your day? Give examples of how data from aspect
A continuous random variable X has the following density function: f(x) = x, 0<=x<=1, = (2-x), 1<x<=2. f(x) = x, 0 less than and equal to "x" less than and equal to 1, = (2-x), 1 less than x less than or equal to 2. Full equation on top does not read out on this web site?? See written out problem for clarification. Not
Collect at least 30 pieces of numerical (quantitative) metric data (see p.16-18) but no more than an n of 50 (30-50 observations and only one theme). If you have a sample larger than 50 randomly select a subset so your n (sample size) is no more than 50. From the data, plot a histogram, a stem-and-leaf diagram and an ogive
Each month the U. S. Bureau of Labor Statistics publishes a variety of unemployment statistics, including the number of individual s who are unemployed and the mean length of time the individuals have been unemployed. For November 1998, the bureau of Labor Statistics reported that the national mean length of time unemployment w
Activity Immediate predecessor Time (Days) A - 3 B - 7 C
Describe the difference between assignable variation and chance variation.
Develop a network for this data, total project completion time and the critical path: Activity immediate Predecessor Time(days) A - 2 B
The workload in many areas of bank operations has the characteristics of a non-uniform distribution with respect to time of day. For example, at Chase Manhattan Bank in New York, the number of domestic money transfer requests received from customer, if plotted against time of day, would appear to have the shape of an inverted U
What is New York city homeland doing to keep the state secured? What action are they taking to keep the state secure from terrorism?