2. Zara monthly sales for six months period is as follow:MonthJanFebMarchAprilMayJuneSales180002200016000180002000024000a) Compute the 4-month simple moving average forecast for May, June, July.b) Compute the 4-period weighted moving average with the weights (0.4, 0.3, 0.2,0.1 thatstarts from most recent to furthest in the past). c) Compute the exponential smoothing forecast, assuming for February an initial forecast of18000? Alpha=0.40

Time series is the broad branch in the statistical analysis. It used to predict or forecast the…

Answered: 2. Zara monthly sales for six months…

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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The Department of Statistics Malaysia (DOSM) conducted another study on the monthly gross income (in RM) in Malaysia for 2017. Another four states are selected and the data obtained are shown in Table 2. The Boxplot of the data is given in Figure 1. Based on Figure 1,(i) Determine the shape of the distribution of monthly gross income for Sarawak and Wilayah Persekutuan Kuala Lumpur (W.P.KL). (ii) Given that Q1 ≈ 4900 and Q3 ≈ 9900 , prove that there exist outlier for Wilayah PersekutuanKuala Lumpur (W.P.KL) as illustrated in the Figure 1. Show your calculations.
A data with 18 points will be integrated as accurately as possible using a combination of Simpson's rules. It will require ____ applications of Simpson's 3/8th rule and _____ applications of Simpson's 1/3rd rule
After examining these data for all the jurisdictions, someone notes that certain areas have an unusually high “percent of 18-64 yr-olds with no high school diploma.” Based on this finding, this individual concludes that the high percentages are due to the rising population of immigrants in those areas. Further, the individual argues that any estimates of the associated “percent of low-income working families” in those areas should be recalculated after removing this sub-population from the data set, as they are causing the area to “look bad”. In addition to thinking critically, use the key rules about linear regression and extrapolation to write a statistically appropriate and socially responsible response to the individual’s conclusion and argument.
Define the Distributed Lag Model with Additional Lags and AR(p) Errors?
Suppose a paint manufacturer has a daily production, x, that is normally distributed with a mean of 100,000 gallons and a standard deviation of 10,000 gallons. Management wants to create an incentive bonus for the production crew when the daily production exceeds the 90th percentile of the distribution, in hopes that the crew will, in turn, become more productive. At what level of production should management pay the incentive bonus?
The length of time from the initial exposure to HIV infection to the diagnosis of AIDS is termed as the incubation period. An arbitrary dataset for the incubation period of a random selection of 8 HIV infected patients is presented in the table below: Incubation period (in years) 12.5 10.0 14.0 7.7 11.0 6.8 13.0 10.8 Compute the appropriate measure(s) of central tendency and address its worthiness. Calculate the measure(s) of dispersion and discuss which measure is the most appropriate one and why? What will happen to the sample mean, median, standard deviation if a particular data point 6.8 above has adjusted to 1.5? Discuss whether it will increase, decrease, or remain the same.
Five soft drink bottling companies have agreed to implement a time management program in hopes of increasing productivity (measured in cases of soft drinks bottled per hour). The number of cases of soft drinks bottled per hour before and after the implementation of the program are listed below. Company 1 2 3 4 5 Before 500 475 525 490 530 After 510 480 525 495 533 Test, at level 0.05, whether the time management has been effective in increasing productivity. Let Tobs be the observed value of the appropriate test statistics. Group of answer choices Since Tobs = -2.82 > -4.604 we do not have enough evidence to conclude that the time management program has been effective in increasing production. Since Tobs = -2.82 < -2.132 we can conclude that the time management program has been effective in increasing production. Since Tobs = -1.64 > -2.132, we do not have enough evidence to conclude that the time management program has been effective in increasing production.…
9.2.6 The British Department of Transportation studied to see if people avoid driving on Friday the 13th. They did a traffic count on a Friday and then again on a Friday the 13th at the same two locations ("Friday the 13th," 2013). The data for each location on the two different dates is in table #9.2.6. Estimate the mean difference in traffic count between the 6th and the 13th using a 90% level. Table #9.2.6: Traffic Count Dates 6th 13th 1990, July 139246 138548 1990, July 134012 132908 1991, September 137055 136018 1991, September 133732 131843 1991, December 123552 121641 1991, December 121139 118723 1992, March 128293 125532 1992, March 124631 120249 1992, November 124609 122770 1992, November 117584 117263
A suburban hotel derives its revenue from its hotel and restaurant operations. Theowners are interested in the relationship between the number of rooms occupied on anightly basis and the revenue per day in the restaurant. Below is a sample of 25 days(Monday through Thursday) from last year showing the restaurant income and numberof rooms occupied.
Consider again the salesperson discussed in previous Problems (given in picture) who is trying to locate a particular product. Calculate the variance and standard deviation of the number of warehouses called by the salesperson.
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By comparing Tables Six and Nine, discuss the impacts on the estimation results ifheteroskedasticity is present.

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