Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
combined mean and standard deviationoccasionally we may need to combine 2 or more samples say a and b therefore it is essential to identify the new
illustration 2 in a described farm located in the uk the average salary of the employees is pound 3500 along with a standard deviation of pound150
relative measures of dispersiondefinition of relative measures of dispersion a relative measure of dispersion is a statistical value that may be
variance square of the standard deviation is termed as variancethe semi inter-quartile range- it is a measure of dispersion which includes the use of
with their fence in place zack and clint set to work landscaping yards since clint did the majority of the actual landscaping and planting he worked
the math equation is written exactly this way 050x1-60-60x010 the answer i get is 10 and others say
probability-probability is an extremely popular concept in business management since it covers the risks such may be included in certain business
forecasting by using least squaresdata have been kept of sales over the last seven yearsyear1234567sales in 000 units14171523182227it is required to
longer- term forecastingmoving averages exponential smoothing and decomposition methods tend to be utilized for short to medium term forecasting
forecast errorsdifferences among actual results and predictions may arise from many reasons they may arise from random influences usual sampling
time series modelsadditive modeltime series value t s c rwhereas s c and r are expressed in absolute valueadditive model model is best suited where
characteristics of time seriestime series has the given characteristicsa a long term trend t -tendency of the whole series to fall and riseb seasonal
characteristics of exponential smoothing1 more weight is described to the most recent data2 all past data are incorporated not like in moving
questionclassify the following differential equations as linearnonlinear also what is the order of the following differential equationsxy-2y xxy -2y
example of exponential smoothingby using the previous example and smoothing constant 03 generate monthly forecastsmonthssalesforecasts a
questionin the interest of saving up enough money for retirement you have created a bank account to store a sum of money compound interest on
exponential smoothingit is a weighted moving average technique this is described bynew forecast old forecast a latest observation - old
characteristics and limitations of moving averagecharacteristics of moving average 1 the more the number of periods in the moving average the greater
calculate moving averagethe table given below represents company sales calculate 3 and 6 monthly moving averages for
impediments in time series analysisaccuracy of data in reflectinga drastic changes for illustration in the advent of a major competitor period of war
time series and analysisit is the statistical or mathematical analysis on past data arranged in a periodic sequence decision making and planning in
exponential and geometric modelexponential model y abxtake log of both sideslog y log a log bxlog y log a xlog bassume log y y and log a a
non linear relationshipsif the correlation coefficient and the scatter diagram do not indicate linear relationship then the relationship may be
multiple linear regression modelsthere are situations whether there is more than one factor which influence the dependent variableillustrationcost of
liner regressionthe calculations for our sample size n 10 are described below the linear regression model is y a bxtabledistance x milestime y