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

In a sample of 400 population from a village 230 are found to be eaters of vegetarian items and the rest non-vegetarian items. Compute the standard error assuming that both vegetarian and non-vegetarian foods are equally popular in that village?

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A ______ may be finite or infinite according as the number of observations or items in it is finite or infinite

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A ______ of statistical individuals in a population is called a sample

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A finite subset of statistical individuals in a population is called ______

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Any statistical measure computed from sample data is known as ______

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A ______ is one where each item in the universe has an equal chance of known opportunity of being selected

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A random sample is a sample selected in such a way that every item in the population has an equal chance of being included

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Which one of the following is probability sampling

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In simple random sampling from a population of units, the probability of drawing any unit at the first draw is

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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