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e.g. you wanted to conduct a test on teenagers, if you wanted to test an entire population you would have to test every teenager in the world. BY using random sampling or stratisfied random sampling you can get fair results which represents the entire population and takes far less time.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoThey are used because samples help make sure the information is right.
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Which kind of sample is most frequently used by social scientists?
Social scientists most often use a random sample
How did Ingenhousz collect a sample of dephlogisticated air?
use your brain
How would you use trance in a sentence?
Sample Sentence: The magician put his audience into a trance.
What is the use of disposable gloves?
Disposable gloves keep you from catching disease or contaminating a sample.
Science what is a sample taken without bias?
The answer is Random Sample
Why do smaller populations need larger sample sizes?
They do not. Population size does not affect the sample size. The variability of the characteristic that you are trying to measure and the required accuracy will determine the appropriate sample size.
How do you use sample in a sentence?
"This is a sample of how to use the word 'sample' in a sentence."
Why do we sample and estimate populations?
The bottom line is it would be wasteful and foolish to use the entire population when a sample, drawn scientifically, provides accuracy in representing your population of interest. Assessing all individuals may be impossible, impractical, expensive or even inaccurate.
Using a pooled sample estimator for sigma squared assumes the two populations have what?
equal variances
Difference between Population From a sample?
population is the number of citizens living in a defined geographical area. Sample is a number taken from the population being the sample to research for a topic about the populations' behavior or habit, etc.
What are the assumptions underlying the two sample t test?
The assumptions of a two-sample t-test are: Each sample come from a normally distributed population. Both populations have equal variances. The data are sampled independently from each population.
What equipment do they use analyze sample?
what equipment do DNA use to analyzle sample?
Among human populations the primary use of fresh water is for?
The primary use of freshwater among human populations is for agriculture and industry purposes.
Does a Quota Sample represent the whole population?
yes because the quota sample include the random sample and when we have over estimation we will use the quota sample
What is a sample name of an insecticide?
A horticultural oil or an insecticidal soap is a sample name of an insecticide. An insecticide is used to control insect populations. The two examples given are organic controls because of their non reliance on chemicals and synthetic ingredients.
How do scientist sample or estimate populations of plants or animals in different habitats?
they take animals into breeding pens and take a number through 100 and guess
Why are researchers concerned about the representativeness of the samples in their studies?
They hope to generalize the findings of their studies to populations of interest. When a sample is not representative of the generalization of the population it may be inaccurate.
