In a survey question for a sample of 250 individuals, 100 students gave response 'good', 60 gave response 'average' and 90 students gave response as 'extra ordinary'. The point estimate of the proportion in the population who respond 'extra ordinary' is:

A simple random sample consists of four observations 7, 8, 10, 7. The point estimate of population standard deviation is :

Out of 1000 employees, 100 have to be selected for a survey . After being arranged in the alphabetical order each one is assigned a number from 1 to 1000. A number 4 is selected and then every 10th person is selected (i.e 4 , 14, 24 ... ) . Which form of sampling is this an example of ?

The standard deviation of a sampling distribution of a statistic is also known as :

A simple random sample consists of five observations 2, 4, 7, 12, 15. The point estimate of the population mean is :

Statistical inference is a process through which inference about the population are made based on informations obtained from the:

A simple random sample consists of five observations: 2, 4, 6, 7,11, then which of the following are true ?

A. Sample mean = 7.5

B. Sample mean = 6

C. Sample standard deviation = $\sqrt{11}$

D. Sample standard deviation = $\sqrt{11.5}$

Choose the correct answer from the options given below: