HSC Commerce Class 12 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Business Mathematics and Statistics

The time to failure in thousands of hours of an important piece of electronic equipment used in a manufactured DVD player has the density function
f(x) = `{{:(2"e"^(-2x)",",  x > 0),(0",",  "otherwise"):}`
Find the expected life of this piece of equipment

Mention two branches of statistical inference

What is an estimator?

What is an estimate?

What is point estimation?

What is interval estimation?

What is confidence interval?

Choose the correct alternative:

The method of obtaining the most likely value of the population parameter using statistic is called ______

Choose the correct alternative:

An estimator is a sample statistic used to estimate a

Choose the correct alternative:

______  is a relative property, which states that one estimator is efficient relative to another

Choose the correct alternative:

If probability `"P"[|vectheta - theta| < ε] -> 1` as `"n" -> oo` for any positive ε then `vectheta` is said to ______ estimator of `theta`

Choose the correct alternative:

An estimator is said to be ______ if it contains all the information in the data about the parameter it estimates

Choose the correct alternative:

An estimate of a population parameter given by two numbers between which the parameter would be expected to lie is called an ______ interval estimate of the parameter

Define Index Number

State the uses of Index Number

Mention the classification of Index Number

Define Laspeyre’s price index number

Explain Paasche’s price index number

Write note on Fisher’s price index number

State the test of adequacy of index number