test 4 Flashcards
The most basic statistical tools for summarizing data? (data)
Frequency distributions
Proportions
Measures of central tendency
What are the two applications of statistics
-To describe characteristics of the population or sample -To generalize from a sample to a population
Top vs Bottom box scores
Top box - generally refers to the portion of respondents who choose the most favorable response toward a company
Bottom box - the portion of respondents who choose the least favorable response to some question about customer opinion
What is the sampling distribution called
called the expected value of the statistic
Three factors required to specify sample size
The variance, or heterogeneity, of the population
The magnitude of acceptable error
The confidence level
What is E
The magnitude of error, or the confidence interval
Researcher must follow three steps
- Estimate the standard deviation of the population
- Make a judgment about the desired magnitude of error
- Determine a confidence level
