Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
Sample size n = 60
Sample S.D S = 2.5
Population S.D a = 3
The standard error for sample S.D is given by
`sqrt(sigma^2/(2"n")) = sqrt((3)^2/(2(60))`
= `3/sqrt(120)`
= `3/10.954` = 0.27387
= 0.2739
Thus standard error for sample S.D = 0.2739
APPEARS IN
संबंधित प्रश्न
In a village of 200 farms, a study was conducted to find the cropping pattern. Out of the 50 farms surveyed, 50% grew only wheat. What is the population and the sample size?
Do samples provide better results than surveys? Give reasons for your answer.
Explain in detail about simple random sampling with a suitable example
Explain in detail about systematic random sampling with example
State any three merits of stratified random sampling
State any two merits for systematic random sampling
A sample of 1000 students whose mean weight is 119 lbs (pounds) from a school in Tamil Nadu State was taken and their average weight was found to be 120 lbs with a standard deviation of 30 lbs. Calculate the standard error of the mean
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
