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33 terms
Terms | Definitions |
|---|---|
 What are the two areas of statistics? | descriptive stats and inferential stats |
| define descriptive stats | includes collection, presentation and description of sample data |
| define inferential statistics | refers to the technique of making decisions and drawing conclusions about populations |
| a single entity, usually a person or an object, whose characteristics are of intest | a unit |
| the complete collection of units about which information is sought | the population |
| population is the same as | population of units |
| what are the two kinds of populations | finite and infinite |
| finite populations contain | finite number of units |
| infinite populations contain | infinite number of units |
| categorize this example: all daily newspapers published in the united states | finite |
| categorize this example: all companies listed on the new york stock exchange | finite |
| categorize this example: all students admitted to BSU for fall 2009 | finite |
| categorize this example: all books to be published after 2012 | infinite |
| Any subset of a population | a sample |
| a sample has what role? | it is a representative of the population |
| a characteristic about each unit of a population or sample | a variable |
| can there be several characteristics?(variables of interest) | yes |
| this yields non-numerical information | qualitative variable |
| another name for qualitative | categorical |
| can one use arithmetic such as addition and averaging for data from a qualitative variable | no |
| What are the two subgroups of qulitative variables | nominal, and ordinal |
| define nominal | places a unit into one of several groups or categories |
| gender, breeds of animals, colors, brand names of products are all examples of... | a nominal variable |
| define an ordinal variable | incorporates an ordered postition or ranking |
| level of preference, level of satisfaction, ranking are all examples of... | an ordinal variable |
| this yields numerical measurements | a quantitative variable |
| what is another name for quantitative | numerical |
| can arithmetic operations be used with quantitative variables | yes |
| what are the two subgroups of quantitative variables | discrete and continuous |
| define a discrete variable | assumes only a countable number of values |
| number of defects, number of students registered in courses are all examples of what... | discrete variables |
| define continuous variable | can take any one of the uncountable number of values in an interval |
| height weight, birth rate, SAT score, GPA score, temperature, and wind speed are all examples of what... | a continuous variable |
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