HSC Commerce कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Business Mathematics and Statistics

Explain cyclic variations

Discuss about irregular variation

Define seasonal index

Explain the method of fitting a straight line

State the two normal equations used in fitting a straight line

State the different methods of measuring trend

Compute the average seasonal movement for the following series

The following figures relates to the profits of a commercial concern for 8 years

Find the trend of profits by the method of three yearly moving averages

Find the trend of production by the method of a five-yearly period of moving average for the following data:

The following table gives the number of small-scale units registered with the Directorate of Industries between 1985 and 1991. Show the growth on a trend line by the free hand method.

The annual production of a commodity is given as follows:

Fit a straight line trend by the method of least squares

Determine the equation of a straight line which best fits the following data 

Compute the trend values for all years from 2000 to 2004

The sales of a commodity in tones varied from January 2010 to December 2010 as follows:

Fit a trend line by the method of semi-average

Use the method of monthly averages to find the monthly indices for the following data of production of a commodity for the years 2002, 2003 and 2004

Calculate the seasonal indices from the following data using the average method:

The following table shows the number of salesmen working for a certain concern:

Use the method of least squares to fit a straight line and estimate the number of salesmen in 1997

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A time series is a set of data recorded

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A time series consists of

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The components of a time series which is attached to short term fluctuation is

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Factors responsible for seasonal variations are