QA
Terms
undefined, object
copy deck
- Normal Probability Distribution
- has two parameters; population mean=u; population standard deviation=o
- Subjective Probability
- Based on past experience and feelings.
- Nominal Data
- Categories Only, Data cannot be arranged. gender,race, religion
- Box Plot
- provides the quartiles and other information about the distribution of the data set.
- Independent Events
- When one events does NOT influence the outcome of the other event.
- Statistics
- A collecting method for planning, obtaining, and organizing.
- Central Tendency
- expected value, average of the discrete distribution.
- Stratified Sampling
- the population is divided into 2 or more subpopulations, and a random sample is drawn from each group.
- Probability Distribution
- a list of data values and their associated probabilities.
- Descriptive Statistics
- Describe the population is the goal.
- Deciles
- 10 equal parts.
- Conditional Probability (Bayes Theorem)
- The probability of one event given that another event has occurred.
- Probability
- A numerical statement about the likelihood that an events will occur.
- Permutation
- order matters.
- Random Variables
- It assigns a real number to the experimental outcome. two types; discrete and continuous
- Mutually Exclusive
- only one of the events can occur on any one trial.
- Sampling with replacement
- you DO return
- Continuous Distribution
- results from measuring something such as distance, weight, amount of anything else.
- Fundamental Concepts of Probability
- the probability of any event occurring is between 0 and 1 inclusive. and the sum of the sampling must equal 1.
- Ordinal Data
- Categories are ordered but difference cannot be determined. 1st, 2nd, 3rd
- Discrete
- can only assume a finite or limited set of values.
- Cluster Sampling
- divide the group into clusters and then select some random clusters.
- Objective Probability
- Based on relative frequency or Logic
- Outliers
- values that lie far away from the majority values.
- Random Sampling
- a random sampling from a population.
- Median
- Middle
- Quartiles
- 4 equal parts.
- Class Frequency
- the number of observations in each category
- Sample
- a sub-collection of elements
- Systematic Sampling
- Chose a starting point and then select every N'th elements.
- Percentiles
- 100 equal parts.
- Convenience Sampling
- uses data that is already available.
- Contingency Table
- a two-way frequency tables, a cross-tabulation table that summarizes two variables of interest and their relationship.
- Dependent Events
- When one events does influence the outcome of the other event.
- Relative Frquency
- the relationship between a class total and the total number of observations.
- Data Set
- A set of measurements obtained.
- Variance
- spread or dispersion of the data about the mean.
- Continuity Correction Factor
- subtract or add .5, depending on the question.
- Collectively Exhaustive
- the list of outcomes includes Every possible outcome.
- Pie Chart
- Shows the proportion or the percentile that each class represents.
- Sampling with out replacement
- you DO NOT return.
- Ratio Data
- Interval data with an absolute Zero. length, width, distance, K
- Joint Probability
- The probability of two or more events occuring together one right after another.
- Interval Data
- Differences between values can be found, but is NO absolute ZERO. Temperature F, time
- Binomial Distribution
- success or failure; fixed number of trials; probability of S or F stay the same for each trial; and the trials are independent.
- Continuous
- can only assume an infinite set of values.
- Combination
- order DOES NOT matter.
- Interquartile Range
- Q3-Q1
- Standard Normal Distribution
- to trasform the values of a random variable "X" to a SN random variable "Z" with u=0 and o=1
- Population
- complete collection of all elements.
- Marginal Probability
- The probability of a single event occurring.
- Variation
- Range, Variance, Standard deviation
- Characteristics of Data
- Nature and shape, central tendency, and measure of dispersion.
- Bar Chart
- class on the horizontal axis and the class frequency on the vertical axis.