Assuming that trend is absent, determine if there is any seasonality inthe data given below :Ist Quarter3rd Quarter4th QuarterIIIT TYear2nd Quarter20142015201620174.13.94.14.43.33.63.33.53.63.14.03.73.74.03.34.0What are the seasonal indices for various quarters ?

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Answered: Assuming that trend is absent, det…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Consider the following time series data. Month 1 2 3 4 6 7 Value 21 12 22 14 18 21 14 Round your answers to two decimal places. a. Compute MSE using the most recent value as the forecast for the next period. Mean squared error is What is the forecast for month 8? b. Compute MSE using the average of all data available as the forecast for the next period. Mean squared error is What is the forecast for month 8?
d. Evaluate a seasonally adjusted trend forecasting model. What is the MAD? (Round your answers to 4 decimal places.) $ Sales (Millions) Absolute Error Month Number 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 7 8 1,528 787 779 10 11 12 769 838 773 747 1,584 1,124 775 802 1,316 1,446 751 767 769 841 764 729 Index 1,434 1,057 749 763 1,217 1,331 769 794 770 847 787 761 1,424 1,046 801 828 1,319 1,204 726 745 Period 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37 38 39 Trend What is the average monthly trend in book-store sales? (Negative amounts should be indicated by a minus sign. Round your answer to 4 decimal places) Average monthly trend in bookstore sales -1. What are the monthly indexes? (Round your answers to 4 decimal places) Month 1 2 3 4 5 6 Index million dollars per month Forecast MAD-
Assuming that trend is absent, determine if there is any seasonality in the data given below: 3rd Quarter 4th Quarter Year 1st Quarter 2nd Quarter 1977 1978 1979 1980 3.7 3.7 4.0 3.3 4.1 3.9 4.1 4.4 3.3 3.6 3.3 4.0 3.5 3.6 3.1 4.0 what are the seasonal indicies for v arious quarters.
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A statistical program is recommended. A company that sells musical instruments has been in business for five years. During that time, sales of pianos increased from 12 units in the first year to 77 units in the most recent year. The firm's owner wants to develop a forecast of piano sales for the coming year. The quarterly sales data follow. Year = 1 2 3 4 5 Quarter 1 Quarter 2 Need Help? 4 6 11 12 19 Read It 2 4 3 9 10 Quarter 3 Quarter 4 1 4 5 7 13 5 14 pianos pianos pianos pianos 16 22 35 Total Yearly Sales 12 28 (a) Use the following dummy variables to develop an estimated regression equation to account for any seasonal and linear trend effects in the data: x₁ = 1 if quarter 1, 0 otherwise; X₂ = 1 if quarter 2, 0 otherwise; and x3 = 1 if quarter 3, 0 otherwise. (Let t = 1 denote the time series value in quarter 1 of year 1; t = 2 denote the time series value in quarter 2 of year 1;... and t = 20 denote the time series value in quarter 4 of year 5. Round your numerical values to two…
Which best describes the slope of the trendline pictured?
Explain the meaning of the accompanying percentiles. (a) The 5th percentile of the head circumference of males 3 to 5 months of age in a certain city is 41.5 cm. (b) The 80th percentile of the waist circumference of females 2 years of age in a certain city is 49.8 cm. (c) Anthropometry involves the measurement of the human body. One goal of these measurements is to assess how body measurements may be changing over time. The following table represents the standing height of males aged 20 years or older for various age groups in a certain city in 2015. Based on the percentile measurements of the different age groups, what might you conclude? E Click the icop to view the data table for part c. (a) Explain the meaning of "The 5th percentile of the head circumference of males 3 to 5 months of age in a certain city is 41.5 cm." Choose the correct answer below. O A. 95% of 3- to 5-month-old males have a head circumference that is 41.5 cm or less. O B. 5% of 3- to 5-month-old males have a head…

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Assuming that trend is absent, det ermine if there is any seasonạlity in the data given below: ÍIIT T Year Ist Quarter 2nd Quarter 3rd Quarter 4th Quarter 2014 2015 2016 2017 4.1 3.9 4.1 4.4 3.3 3.6 3.3 4.0 3.5 3.6 3.1 4.0 3.7 3.7 4.0 3.3 What are the seasonal indices for various quarters ?