MATH 1

The exercise was created 2023-10-01 by hannahentze. Question count: 35.

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  • Σ Sigma. The summation
  • σ population standard deviation
  • μ average mean of the population
  • N the size of the population
  • σ2 population variance
  • s2 sample variance
  • μ population mean
  • x̄ sample mean
  • what is Inferential statistics? uses methods that take results from a sample
  • What is parameter? a numerical summary of a population
  • what is statistics a numerical summary of a sample
  • qualitative variables? characteristcs
  • quantitative variables? Height or weight for example
  • what are the two different kinds of quantitative variables? discrete and continuous
  • what is a discrete variable? A discrete variable is countable
  • what is a continuous variable? measurable
  • n sample size
  • what is ordinal Income levels, etc. An ordinal scale is one where the order matters but not the difference between values.
  • what is interval Temperature, etc. An interval scale is one where there is order and the difference between two values is meaningful.
  • What is ratio? For example pulse, weight, length, etc.
  • what is nominal Blood type, zip code, gender. A nominal scale describes a variable with categories that do not have a natural order or ranking.
  • what is a lurking variable? an explanatory variable that was not considered in a study
  • A systematic sample? s obtained by selecting every kth individual from the population
  • A stratified sample is obtained by separating the population into non overlapping groups called strata and then obtaining a simple random sample from each stratum
  • A cluster sample is obtained by selecting all individuals within a randomly selected collection or group of individuals.
  • A convenience sample is a sample in which the individuals are easily obtained and not based on randomness.
  • Random sampling is the process of using chance to select individuals from a population to be included in the sample.
  • Sampling bias Sampling bias means that the technique used to obtain the individuals to be in the sample tends to favor one part of the population over another.
  • Nonresponse bias this exists when individuals selected to be in the sample who do not respond to the survey have different opinions from those who do
  • Response bias Response bias exists when the answers on a survey do not reflect the true feelings of the respondent.
  • Cumulative increasing, growing
  • Ogive cumulative frequency graph
  • consecutive following one after the other in order
  • What is the mode? The one that appears the most is the mode.
  • what is the 5 number summary? Min, Q1, Q2, Q3 and Max

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