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Descriptive Statistics


PART ONE - 1. Arcs in a project network indicate a. completion times. b. precedence relationships. c. activities. d. the critical path. 2. The critical path a. is any path that goes from the starting node to the completion node. b. is a combination of all paths. c. is the shortest path. d. is the longest p


(See attached file for full problem description) only the first 3 problems: 187. The store policy is that items not sold in one month are reduced 10% in price. Product X costs you $30.00 when you purchase 50. During the first month you sell 20 units of product X at $50.00; the remaining 30 are sold in the second month. What i

Comparing two companies' salary offers

You are applying for a job at two companies. Company A offers starting salaries with mean = $37,000 and standard deviation = $11,000. Company B offers starting salaries with mean = $37,000 and standard deviation = $8,000. For which company would you be more likely to get a starting salary of $56000?

Descriptive Statistics Calculation

Chapter 1, Exercise 2, p 14 What is the level of measurement for these items related to the newspaper business? a. The number of papers sold each Sunday during 2004. b. The departments, such as editorial, advertising, sports, etc. c. A summary of the number of papers sold by county. d. The number of years with the pa


A local newspaper has 10 delivery boys who each deliver the morning newspaper to 50 customers every day. The owner decides to record the percentage of papers delivered on time for a 10-day period and construct a p chart to see whether the percentage is too erratic. Day Percentage of Papers Delivered on Time 1 91.6 2 89.4 3

EOQ Model

Demand for a popular athletic shoe is nearly constant at 800 pairs per week for a regional division of a national retailer. The cost per pair is $54. It costs $72 to place an order, and annual holding costs are charged at 22% of the cost per unit. The lead time is two weeks. a. What is the EOQ? b. What is the reorde

Assistance with stats

I. What level of data? Question: If statisticians were planning a study on the levels of measurement, how would they identify numbers associated with the example below? (a)scores on a teacher-prepared math test __________________________ (b)scores on a commercially prepared standardized reading test_____________ (c)

Mean Annual Commissions

The annual commissions earned by sales representatives of Machine Products, Inc. a manufacturer of light machinery, follow the normal distribution. The mean yearly amount earned is $40,000 and the standard deviation is $5,000. a. What percent of the sales representatives earn more than $42,000 per year? b. What percent of th

Statistics Multiple Choices

1. The Herfindahl-Hirschman (HH) Index is used to a) measure the degree of market concentration in an industry. b) measure the extent of price leadership. c) measure the degree of nonprice competition. d) None of the above. 2. Which of the following conditions would definitely cause a perfectly competitive company to shut

Matched pairs technique

The following data give the gains in weight of eight pairs of experimental animals matched with respect to growth factors. One of each pair, selected by chance, was given a supplement of vitamin B to its regular diet. Use the matched pairs technique to test whether B had no influence on weight. The following data give the gai

Determining a Difference in Means

The operations manager at a light bulb factory wants to determine whether there is a difference in the average life expectancy of bulbs manufactured on two different types of machines. The process standard deviation of Machine I is 110 hours and of Machine II is 125 hours. A random sample of 25 lights bulbs obtained from Machi

Sample Distribution and Normal Distribution

For a sample size 16, the sampling distribution of the mean will be approximately normally distributed: A. regardless of the shape of the population B. if the shape of the population is symmetrical C. if the sample standard deviation is known D. if the sample is normally distributed

Poisson Distribution and Interpretation of the Mean

The local police department must write on average 5 tickets a day to keep department revenue at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with a mean of 6.5 tickets per day. Which of the following statements is the best interpretation of the value of the mean? A. The number

Describing the the Shape of a Distribution

The following is a five-number summary calculated from observations of the percentage of calories that come from fat in 23 items advertised as "reduced" fat from a sample of fast food chain restaurants. Form the box-and-whisker plot, select the phrase below which best describes the shape of the distribution. 15 20 22

Solving for the Mode

56 21 38 17 15 67 45 48 60 56 22 53 37 17 50 92 39 16 59 73 17 31 28 51 74 42 31 What is the mode of the array above? (show the answer rounded to the nearest whole number) A. 17 B. 31 C. 42 D. 56

Salaries of baseball players

I would like your HELP in answering these questions. The questions are related to the same subject SALARIES OF BASEBALL PLAYERS; 1. Are you looking at average teams, payrolls or individual player's salaries? I would answer TEAMS SALARIES 2. And if the latter, then what is the logic for any variation? 3. Is there a caus

Descriptive Statistics : Mean, Median, Mode and Standard Deviation

Please see the attached file for the fully formatted problems. Unit 9: Critical Thinking Exercise Data Collection and Data Analysis The Tastee-Yummy Dog Bone Company has developed four new commercials for their line of flavored dog cookies. Before selecting one of the commercials for production, they conducted research to a

Production Department of NDB Electronics

The production department of NDB Electronics wants to explore the relationship between the number of employees who assemble a sub-assembly and the number produced. As an experiment, two employees were assigned to assemble the sub-assemblies. They produced 15 during a one-hour period. Then four employees assembled them. They

Describing, Exploring, and Comparing Data

1.Senator Hayes is considering a a run for the U.S. presidency, but she is only 35 years of age, which is the minimum required age. While investigating this issue, she finds the ages of past presidents when they were inaugurated, and those ages are listed below. Using the ages listed find the (a) mean; (b) median; (c) mode; (d)

Scatter Diagram for "Best Small Companies" Sales and Earnings

A recent article in Business Week listed the "Best Small Companies." We are interested in the current results of the companies' sales and earnings. A random sample of 12 companies was selected and the sales and earnings, in millions of dollars, are reported below. Sales Earnings

Statistics - Descriptive Data

Kimble Products: Is There a Difference In the Commissions? At the January national sales meeting, the CEO of Kimble Products was questioned extensively regarding the company policy for paying commissions to its sales representatives.The company sells sporting goods to two major markets. There are 40 sales representatives who

Sexually Transmitted Diseases and Statistical Analysis

General K. is concerned about sexually transmitted disease (STD) among the troops. In random inspection of 100 soldiers, 31 were found to have a venereal disease. To reduce the incidence, soldiers were shown an educational film on preventing STDs. In a second inspection of 200 soldiers, 43 had STDs. Calculate the following s

Length of time to complete 1040 tax form

According to an IRS study, it takes an average of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. A consumer watchdog agency selects a random sample of 40 taxpayers and finds the standard deviation of the time to prepare, copy, and electronically file form 1040 is 80 minutes. a) What assum

Calculating A-C as described

A study is made by the recording industry in the US of the number of music CDs owned by senior citizens and young adults. The information is reported below Seniors 28 35 41 48 52 81 97 98 98 99 118 132 133 140 145 147 153 158 162 174 177 180 180 187

Stats for social sciences

Data collected by the highway patrol indicate that the average speed on the stretch of an interstate is 63mph with a standard deviation of 15. What is the likelihood of observing a vehicle traveling 80 mph or more?