Respond to each of the items using the following time series data. Period Demand 1 20 2 46 3 20 4 9 5 17 6 8 7 19 8 34 9 39 10 4 11 32 12 23 13 10 14 27 b. Compute all possible forecasts using exponential smoothing with a smoothing coefficient (α) of 0.3. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) Period Demand Exponential Smooth Error Absolute Error 1 20 2 46 3 20 4 9 5 17 6 8 7 19 8 34 9 39 10 4 11 32 12 23 13 10 14 27 15 c. Compute all possible forecasts using exponential smoothing with a smoothing coefficient (α) of 0.7. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) Respond to each of the items using the following time series data. Period Demand Exponential Smooth Error Absolute Error 1 20 2 46 3 20 4 9 5 17 6 8 7 19 8 34 9 39 10 4 11 32 12 23 13 10 14 27 15 d. Compute the MADs for each forecast model. (Round your answers to 3 decimal places.) e. Which forecast model would you choose? Why?

1 - A simple exponential smoothing model has a current mean of 156.8. Assuming demand for next period is 170, update the value of the smoothing statistic. Let a = 0.1.   2- An electronics company has sold 145, 157, 124, 169,179, 201, 197, and 230 units of a certain stereo system quarterly for the past two years. Plot the data and fit an appropriate model. Forecast sales for the next two quarters.

A 18.2% B 15.7% C 22.2% D 4.4%

The figure below illustrates monthly data over 10 years. What method would you expect would perform the best at forecasting the data series in period 121? Explain the (i) strengths of your selected method for this data and the (ii) weaknesses of alternative methods for this data. Consider the concepts of level, seasonality, trend, and noise in your answer.

For the following claim, find the critical value. Assume that a simple random sample has been selected from a normally distributed population. Claim: The mean IQ score of statistics professors is greater than 130 Sample data: n=28, x= 131, s = 8. The significance level is a = 0.01. Click the icon to view a table of critical t-values. Find the critical value using a t-distribution table. OA. 2.771 OB. 2.473 OC. 2.763 OD. 2.467 t-table t distribution: Critical t values Degrees of Freedom 1 23455 2 3 6 7 8 9 10 5.841 4.604 5 4.032 3.707 3.499 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1268885MINHAS 27 29 30 31 32 33 34 35 36 37 0.005 38 0.01 63.657 9.925 3.355 3.250 3.169 3.106 3.055 3.012 2.977 2.947 2.921 2.898 2.878 2.861 2.845 2.831 2.819 2.807 2.797 2.787 2.779 2.771 2.763 2.756 2.750 2.744 2.738 2.733 2.728 2.724 2.719 2.715 2.712 2709 0.01 0.02 31.821 6.965 4.541 3.747 3.365 3.143 2.998 2.896 2.821 2.764 2.718 2.681 2.650 2.624 2.602 2.583 2.567 2.552 2.539 2.528 2.518 2.508…