Which of the following is not an element of a good forecast? a. timeliness b. accuracy c. mobility d. simplicity | Homework.Study.com (2024)

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• Which of the following is a technique used to determine forecasting accuracy? - exponential smoothing - moving average - Delphi method - mean absolute percent error
• Which of the following is a technique used to determine forecasting accuracy? a) moving average b) exponential smoothing c) mean absolute percent error d) Delphi method
• Which of the following is a technique used to determine forecasting accuracy? a. Delphi method b. moving average c. exponential smoothing d. mean absolute percent error
• List and define the three principal ways of measuring forecast accuracy. What are the key differences among them?
• Which mode of transportation takes lesser time for conveyance on an average?
• What is the fundamental weakness of a quasi-experimental design? Why is it a weakness? Does its weakness always matter?
• What is the expected value of perfect information?
• Which of the following r's have the least predictive value? a. 0.91 b. 0.5 c. 0.17 d. 0.23 e. -1.00
• Which of the following r's have the least predictive value? a. 0.91 b. 0.50 c. 0.17 d. 0.23 e. -1.00
• Discuss the advantages and disadvantages of using the moving average method.
• Which of the following is not a strength of the mode? - Easy to determine, requiring virtually no calculations. - Can be used with any level of measurement, nominal through ratio. - The mode can never be misleading. - All of the above are strengths of t
• What decision would you make based on the expected utility approach?
• What is the strength of the following correlation? 0.687 a. Weak b. Moderate c. Strong
• What is the strength of the following correlation? 0.156 a. Weak b. Moderate c. Strong
• What are the strengths and weaknesses of using confidence intervals in making decisions?
• Which is not a characteristic of an effective summary table? A. The main point should be clear within 10 seconds. B. Data to be compared should be displayed in rows, not columns. C. Data should be rounded to three or four significant digits. D. Use spa
• Which of the following is an example of perfect mulitcollinearity? a. When X_1i is equal to log(X_1i) and both X_1i and X_2i are included as regressors.
• Which of the following indicates a near perfect association between two variables, A and B? a. - 0.25 b. 0.4 c. - 0.90 d. 0.56
• What is a factor? How can the use of factors benefit a design?
• Which of the following correlations is the strongest? a. -0.81 b. -0.02 c. 0.23 d. 0.74
• Using a two month moving average, what is the forecast for June? A. 19 B. 21 C. 19.8 D. 23
• Which of the following is indicated by Item 2? a. Ambiguous b. Guessing c. Miskeyed d. Too difficult
• Which of the following hypotheses are composite? (Choose all that apply.) (a) theta not equal to 0 (b) theta less than 0 (c) theta greater than 0 (d) lambda an element of (0,1) (e) p an element of (0,1/2)) (f) theta=0 (g) p=-.5 (h) mu=30
• Out of all the known elements, the percentage of transitional elements is approximately: A) 30%. B) 50%. C) 60%. D) 75%.
• Predict the value of y for x = 50. a) 278.836 b) 451.396 c) 192.556 d) not meaningful
• A distribution for which M = 22, Mdn = 20, and Mo = 18 has which characteristic? a) It is symmetrical. b) It is platykurtic. c) It is mesokurtic. d) It has a positive skew.
• Which of the following is not an element? A) Graphite B) Diamond C) 22-carat gold D) Rhombic sulphur
• Describe a situation where it would be appropriate to use forecasting. Include all the necessary steps to develop the forecast and why you would use the forecast you chose.
• What are the conditions for an estimator to be unbiased?
• What are the forecasting methods?
• Which of the following is monoatomic? (a) Nitrogen (b) Fluorine (c) Neon (d) Oxygen
• Which tool is not used to facilitate interpretations of scale scores? A. Weighted scores B. Norms C. Percentiles D. Standard scores
• The Forecast for January was 130. Using an α of 0.4, what is the forecast for July using exponential smoothing? A. 128.8 B. 132.7 C. 126.4 D. 130.2
• What are the properties of a good measure of central tendency?
• Which is the lightest gas? (a) Hydrogen (b) Oxygen (c) Helium (d) Nitrogen
• Which of the following hypotheses are composite? (Choose all that apply)
• List two advantages of the OFACT design.
• Which of the following choices below is not a valid queuing model based on the Kendall notation? a.M/M/3 b.M/D/2 c.M/M/1 d.M/M/0
• What of the following is indicated by Item 2? a. Ambiguous b. Guessing c. Miskeyed d. Too difficult
• Given an actual demand of 59, a previous forecast of 64, and an alpha of 3, what would the forecast for the next period be using simple exponential smoothing? a. 36.9 b. 57.5 c. 60.5 d. 62.5.
• Given an actual demand of 59, a previous forecast of 64, and an alpha of 0.3. What would the forecast for the next period be using simple exponential smoothing? a) 36. 9 b) 57. 5 c) 60. 5 d) 62. 5
• Are there instances where extrapolation was accurate in predicting future conditions or prices or a time when it wasn't?
• What is an example of a banking situation using intrinsic forecasting and extrinsic forecasting?
• True or false? Forecast accuracy increases as the time horizon gets longer.
• What are the two most important characteristics to look for in a scatter diagram?
• Which of the following is a defining characteristic in determining between ratio and interval scales? a. number of items b. absolute zero c. number of intervals d. nominal values
• What is the second best predictor?
• Which of the following is the weakest correlation? a. -0.24 b. -0.22 c. 0.19 d. -0.96
• Which variable has the weakest relationship with the Quadriceps strength index 120^o/s? Provide a rationale for your answer Hop index r = 0.744 p= 0.000 triple hop index r= 0.742 p= 0.000 Shuttle run test r= 0.457 p= 0.010 Side step test r= 0.519 p= 0.003
• What is the best predictor?
• Describe the three elements that all queuing systems have in common.
• Suppose we have glass of milk whose temperature is 8.45 degrees. We calculate a 95% prediction interval for the pH of this glass of milk to be (6.71, 6.88). Which of the following is the correct interpretation of this of this prediction interval? a. There
• What two elements are the most important in minimizing the placebo effect?
• Which of the following is used to simplify and clarify data? a. tables b. graphs c. charts d. all of the above
• Which of the following is the better chart to use if you are plotting monthly averages from a management report? a. u chart. b. Run chart. c. X-bar/s chart. d. X-bar/R chart
• What is meant by a factor? How can the use of factors benefit a design?
• What is the term used for describing the judgmental or commonsense part of problem solving? A. Heuristic B. Critical C. Value based D. Analytical E. None of the above
• In what sense is The Lasso related to feature subset selection?
• Explain why it is still useful to pursue forecasting even though it is often off the mark by wide margins.
• What is data that has been converted into meaningful and useful context? a. information b. information technology c. information systems d. all of the above
• Use Confusion Matrix below to answer the question. Actual Churn & Actual Non-Churn; Predicted Churn & 315 & 51;
• Predict the value of y for x = 90. a) 192.556 b) 386.686 c) 278.836 d) not meaningful
• What are the sample elements from which you will collect the data?
• Which of the following is not a valid queuing model based on the Kendall notation? A) M/M/3 B) M/D/2 C) M/M/1 D) M/M/0
• Which of the two stocks offer the greatest potential for capital gains?
• Describe the two characteristics that will produce the largest value for the estimated standard error.
• What decision does the expected value approach recommended?
• Which of the following values of alpha would cause exponential smoothing to respond the most quickly to changes in demand? A. 0.0 B. 0.1 C. 0.3 D. 0.5 E. 0.9
• What is the difference between a multiple-baseline design and a reversal design?
• What is a tool that can be used to detect the structure variation?
• What is a tool that can be used to detect structure variation?
• How would accuracy be recognized on an X chart? How would precision be recognized on an R chart?
• Predict height based on weight and sex. What is the predicted value for a 138 lb female?
• Determine the error for each of the following forecasts. Then, calculate the MAd and MSE.
• What is the reliability of a system that has 4 identical components in parallel, each with an individual reliability of 90%? a. 0.898 b. 0.943 c. 0.965 d. 0.983 e. 0.9999
• Which of the following is typically a custom-designed form for the purpose of collecting specific data? A. A control chart. B. A check sheet. C. A pareto chart.
• What is the 95% prediction interval for the true delivery cost when the number of deliveries is 300? ||Month||# of Deliveries||Delivery Cost |Jan|100|$1,200 |Feb|500|1,800 |Mar|85|1,100 |Apr|115|1,050 |May|160|1,190 |June|590|1,980 |July|500|1,800 |Aug|5
• What are some practical uses of knowing variation?
• B = [ a b c d ] If a = -5, b =15, c = 8, and d = 5 and I is a 2 x 2 identity matrix then what is the element in the bottom right hand corner of Adj(B) + 4I?
• Which are the appropriate null and alternative hypotheses? Suppose The military has designed a new missile-guidance system. With the old system, 80% of missiles landed within thirty meters of the target at a range of five hundred miles. The military clai
• (a) What is the advantage of computing relative frequency instead of simple frequency? (b) What is the advantage of computing percentile instead of cumulative frequency?
• Decide which elements should be put in region 2 given the information below. U = {a, d, f, h, m, o, r, s, v, w, x, y} A = {a, d, f, h, s, v} B = {h, m, o, r, s, v}
• Which of the following statements about the decision theory is true? a. If the payoff table contains expenses instead of revenues, then the pessimistic criterion is Minimin. b. If a new alternative is added to a payoff table and the maxima criterion is
• Which quiz did you perform better on relative to the rest of the class?
• Using exponential smoothing, with an alpha value of 0.3 and assuming the forecast for January is 26, what is the forecast for June? A. 22.14 B. 21.57 C. 23.00 D. 22.75
• What is the beta of a portfolio with an expected return of 18% if the risk-free rate is 6% and the expected market return rate is 14%?
• Decide which elements should be put in region 3 given the information below. U = (b, c, f, h, k, n, r, t, u, w, x, y) A = (b, c, f, h, t, u) B = (h, k, n, r, t, u)
• Determine the error for each of the following forecasts. Compute MAD and MSE.
• What are the elements of writing out a research proposal?
• What is the 95% prediction interval for Y when X1 is equal to 40 (in 000's)?
• Explain what a reversal design is and identify advantages and disadvantages to using reversal designs.
• What are the two defining characteristics of a data set?
• Explain how bias and accuracy are related.
• Describe some practical uses of knowing variation.
• What are the differences among the confidence, support, and lift metrics for identifying the strongest rules?
• what are the components of defining a problem in excel so that it can be solved using solver?
• What are the most common measurements of system performance in queuing analysis?
• What is the very important characteristic of t-distribution?
• (a) What is the name for SY'? (b) What does SY' tell you about the spread in the Y scores? (c) What does SY' tell you about your errors in prediction?