Flashcards

Vocabulary

Luciana Barros English 15 cards

Cards in this deck (15)

1POPULATIONThe total number of individuals inhabitating an area.
Ex:The Population of United States:325.7 millions.
2SAMPLEA small part of the whole quatity that try's to show how it actually look like.
Ex:A portion or part,of the population.
3ESTIMATIONA rough calculation of what you think hat might be the value , number, quantity, or extent of something.
Ex:What is the perecentage of the people that go to school today.
4HYPOTHESIS TESTINGTo determine if the null hypothesis should be discarded base on the sample data.
Ex.
5NON RANDOM SAMPLE:That it does not give all the individuals the same oportunity.
Ex:Life is only one,there is only one chance to live it.
6SIMPLE RANDOM SAMPLE:Is to give all the individuals in the sample and equal chance to be choosen.
Ex:The lottery,The winners of the lottery are choosen randomly
7STRATIFIED SAMPLE:Is when the population is divided into different groups or strata.
Ex:For example the community is divided into different social classes.
8CLUSTER SAMPLE:Is when the population is divided into those different groups,that are nameed clusters, and a simple random sample is selected.
EX:
For example, a researcher wants to survey academic performance of elementary students in Colombia So he divide the entire population into different clusters (cities). Then the researcher selects a number of clusters depending on his research through simple random sampling.
9SYSTEMATIC SAMPLES:A method of choosing a random sample from among a larger population.According to a random starting point and a fixed periodic interval.
Ex:For example, you could choose every 10th member, or every 100th member. This method of choosing the nth member is called systematic sampling.
10VARIABLE:Is an item of interest that can take on many different numerical values.
Ex:Age, sex, business income and expenses, country of birth, capital expenditure, class grades, eye colour and vehicle type
11QUANTITATIVE:A data observation in a numrical scale..
Ex:Number of children in a family.
12QUALITATIVEQualitative data refers to the data that approximates but is unable to properly measure any attribute.
Ex:Hair color,ethnic groups,the softness a cat,the color of the sky,the softness of the skin etc...
13DATA:Is information,facts or statistics recolect to make reaserch or analysis of an specific topic.
Ex:Information collected for a reaserch paper..
14STATISTICS:Collecting,analyzing,presenting and organizing data to make more adequate and effective decisions.
Ex:
They're 100 students selected from a school with 1000 students. The average height of the sampled students would be an example of a statistic..
15INFERENTIAL STATISTICS:inferential statitics use a random sample of data taken from a population to make inferences about the population.
Ex:
How many people is in Santa Marta ?
-How many people go to work today in Santa Marta?