Advertisements
Advertisements
Question
Suppose there are 10 students in your class. You want to select three out of them. How many samples are possible?
Advertisements
Solution
Population = 10
Number of possible samples = `""^nC_r=""^10C_3`
`= (10!)/(3!(10-3)!)`
`=(10!)/(3!7!)`
= 120
RELATED QUESTIONS
There is a certain bias involved in the non-random selection of samples.
Non-sampling errors can be minimized by taking large samples.
Which of the following errors is more serious and why?
Discuss how you would use the lottery method to select 3 students out of 10 in your class?
Explain the procedure of selecting a random sample of 3 students out of 10 in your class, by using random number tables.
Define parameter
Explain in detail about sampling error
Explain in detail about non-sampling error
State any three merits of stratified random sampling
A random sample of 60 observations was drawn from a large population and its standard deviation was found to be 2.5. Calculate the suitable standard error that this sample is taken from a population with standard deviation 3?
Choose the correct alternative:
A finite subset of statistical individuals in a population is called ______
Choose the correct alternative:
Any statistical measure computed from sample data is known as ______
Choose the correct alternative:
A random sample is a sample selected in such a way that every item in the population has an equal chance of being included
Choose the correct alternative:
Which one of the following is probability sampling
Choose the correct alternative:
In ______ the heterogeneous groups are divided into homogeneous groups
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
