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

Choose the correct alternative:

In ______ the heterogeneous groups are divided into homogeneous groups

Explain the types of sampling

Write short note on sampling distribution and standard error

Determine the standard error of proportion for a random sample of 500 pineapples was taken from a large consignment and 65 were found to be bad

A sample of 100 students is drawn from a school. The mean weight and variance of the sample are 67.45 kg and 9 kg. respectively. Find (a) 95% (b) 99% confidence intervals for estimating the mean weight of the students

Define Time series

What is the need for studying time series?

State the uses of time series

Mention the components of the time series

Define secular trend

Write a brief note on seasonal variations

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: