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Central Tendency

Finding E(Y) for a moment-generating function.

3.88 ===== Use your answer from 3.87 to show that E(Y) = aE(X) +b 3.87: [ If X is a random variable with moment-generating function M(t), and Y is a function of X given by Y=aX+b, show that the moment-generating function for Y is e^(tb) * M(at) ] My answer for exercise 3.87 is attached.

Forecasting Demands for March and January

7. See attached spreadsheet...From this information presented, do the forecasters think that the March demand is more indicative of future demand that the January demand? A.yes B.no 8. See spreadsheet...Was the forecast for october larger than the actual demand? A.yes B.no 9. See spreadsheet...What is the MAD for t

A weighted moving average having the early periods more heavily weighted

A weighted moving average having the early periods more heavily weighted A. is more responsive to recent demand changes. B. is less responsive to recent demand. C. places emphasis on the past demand data. D. is always the most effective weighting scheme. E. is not a time-series model. 2. Which of the following i

Plot this data, examine the plot.

A/Plot this data, examine the plot. Does this view of data suggest a particular smoothing model? Do the data appear to be seasonal? Explain. b/Use a smoothing method to forecast the four quarters of 2005. Plot the actual and forecast values. If you can use software ForcastX that will be good.

Quantitative Methods for Manufacturing Capacity

Q9. The following data represents 15 quarters of manufacturing capacity utilization (in percentages) Quarter/Year Quarter/year Utilization 1/2000 82.5 1/2002 78.8 2/2000 81.3 2/2002 78.7 3/2000 81.3 3/2002 78.4 4/2000 79.0 4/2002 80.0 1/2001 76.6 1/2003 80.7 2/2001 78.0 2/2003 80.7 3/2001 78.4 3

Expected Value and Standard Deviation.

Myers Business Systems is evaluating the introduction of a new product. The possible levels of unit sales and the probabilities of their occurrence are given below: Possible Sales Market Reaction in Units Probabilities Low response . . . . . . . . . . . . . 20 .10 Moderate response . . . . . . . . . 40 .30 High response .

Expected Values, Negative Binomials and Maclaurin Series

Consider the experiment of observing a sequence of Bernoulli trials until exactly r successes occur. Let the r.v. X denote the number of trials needed to observe the rth success. The r.v. X is known as the negative binomial r.v. with parameter p, where p is the probability of a success at each trial. The pmf of the negative b

Salary Probability Job-Medium Salary

You have a new job-median salary 100,000--the standard deviation is $10,000 and salaries are normally distributed: a. What is the probability your salary will be between $85,000-100,000? b. Probability salary will be between 105,000-110,000? c. minimum salary you must earn to be in the top 5% of earners? Thanks

Convert the score of 88 to a standard score.

Dear OTA, Please help me solving this problem.with the detailed steps. 1. Convert the score of 88 to a standard score. Draw the number line and place the score appropriately. mean=93.14,median=95, s=5.33 What % of students scored above 88 and what % scored below scores 80,83,85,88,90,91,92,93,93,93,95,96,96,96,97,97,97,

Decision Making and Expected Values

FINRA is considering three alternatives for providing food services (breakfast and lunch) to its employees: creating a company owned food service and hiring its own staff, hiring an outside vendor to provide food services (outsourcing), or a combination of hiring its own staff and outsourcing. The cost of providing food service

(a) calculate the mean (b) compare the mean and the median

3. Exercise 3 used ISSP date on the number of hours worked per week for a sample of 75 Japanese adults a. Calculate the mean for worked hours worked per week. b.Compare the value of the mean with those you have already calculated for the median. Without constructing a histogram, describe whether and how the

Finding Expected Value

Two different routes accommodate travel between two cities. Route A normally takes 60 minutes, and route B normally takes 45 minutes. If traffic problems are encountered on route A, the travel time in ...there is moreshow problemTwo different routes accommodate travel between two cities. Route A normally takes 60 minutes, and ro

Determining possible values

A list of five integers has mean 12 and range 18. THe mode and median are both 8. Determine possible values for the second largest number.

Statistical Analysis of Real Estate Data

Refer to the real estate Excel data set at: http://highered.mcgraw-hill.com/sites/0073030228/student_view0/index.html a. Select the variable selling price 1. Find the Mean, Median, and the standard deviation 2. Briefly summarize the distribution of the selling prices b. Select the Variable referring to the area of

Expected value and standard deviation

What is the mean (expected value) of the following probability distribution? X 0 1 2 3 4 5 P(x) 0.17 0.15 0.25 0.08 0.15 0.2 Find the standard deviation for the probability distribution in #19.

Payoff Table and Calculations

The proprietor of the newly built White Mountain Ski and Swim Lodge has been considering purchasing or leasing several snowmobiles for the use of guests. The owner found that other financial obligations made it impossible to purchase the machines. Snowmobiles Incorporated (SI) will lease a machine for $20 a week, including any

Stats and forecasting

2. The U.S. Census Bureau publishes data on factory orders for all manufacturing, durable goods, and nondurable goods industries. Shown here are factory orders in the United States from 1987 through 1999 ($ billion). a. Use these data to develop forecasts for the years 1992 through 1999 using a 5-year moving average. b. Us

Forecasting

Given the following data on the number of pints of ice cream sold at a local ice cream store for a 6-period time frame: Period Demand 1 200 2 245 3 190 4 270 5 280 6 300 Compute a 3-period moving average for period 6. 298.55 267.42 242.67 246.67

Forecasting - period of time

Given the following data on the number of pints of ice cream sold at a local ice cream store for a 6-period time frame: Period Demand 1 200 2 245 3 190 4 270 5 280 6 300 Compute a 5-period moving average for period 7. Put your answer in the form xxx with no additional numbers or symbols.

Forecasting - demand for a product

The following data summarizes the historical demand for a product. Month Actual demand March 20 April 25 May 40 June 35 July 30 August 45 Use a four period moving average and determine the forecasted demand for August. Put your answer in the form xx.x with no additional numbers or symbols.

Proportions and Expected Profit

A company sells packages of tea bags. The number of tea bags per package vary as follows: Number of tea bags 98 99 101 103 Proportion of packages ?? .40 .30 .20 a. Find the missing proportion. b. What proportion of the packages contains at least 101 tea bags? c. Find the mean number of tea bags per pac

Network Flow & Programming Problems

1. If we wich to select a location for a new manufacturing plant, the best approach would be to use A. Zero-one integer programming. B. Mixed-integer programming. C. A goal programming model. D. An assignment model. 2. The shortest-route technique might be used for

Yield curve

1) a. Suppose you are considering two possible investment opportunities, a 12-year Treasury bond and a 7-year, A-rated corporate bond. The current real risk-free rate is 4%. Inflation is expected to be 2% for the next two years, 3% for the following four years, and 4% thereafter. The maturity risk premium is estimated by this fo

Payback and Internal Rate of Return

The management of Kitchen Shop is thinking of buying a new drill press to aid in adapting parts for different machines. The press is expected to save Kitchen Shop $8,000 per year in costs. However, Kitchen Shop has an old punch machine that isn't worth anything on the market and that will probably last indefinitely. The new pres