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Math 120 Exams 2024Graded A
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Math 120 Exams 2024Graded A
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Math 120 Exams 2024Graded AStatistics - ANSWER: Is the science of collecting, organizing, summarizing, and
analyzing information to draw conclusions or answer questions
Population - ANSWER: The entire group to be studied is called
Ex: Taking a survey of the whole elementary school of their favorite ice cream
Sample - ANSWER: Is a subset of the population that is being studied
Ex: Out of the whole elementary school 50 students were chosen to participate in a
survey
Descriptive Statistics - ANSWER: Consist of organizing and summarizing data.
Describes data through numerical summaries, tables, and graphs
Parameter - ANSWER: Is a numerical summary of a population
Ex: Suppose 48.2% of all students on your campus own a car. This is numerical
summary of the population
Inferential Statistic - ANSWER: Use methods that take a result from a sample, extend
it to the population, and measure the reliability of the result
Ex: Rather than saying that 78% fo all students would return the money. We might
say that between 74% and 82% fo all students would return the money
Statistic - ANSWER: Is a numerical summary of a sample
Ex: Suppose a sample of 100 students is obtained , and from this sample we find
that 46% own a car
Explanatory variable - ANSWER: is one that explains changes in that variable.
Response variable - ANSWER: is the focus of a question in a study or experiment.
Qualitative variable - ANSWER: allow for classification of individuals based on some
attribute or characteristics
Quantitative variable - ANSWER: provide numerical measures of individuals
Discrete variable - ANSWER: is a quantitative variable that has either a finite number
of possible values or countable number of possible values. Cannot take on every
possible value between any two possible values
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