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Stats Modual 1
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Terms in this set (27)
Mean
The sum of the data values by the total number of data values
Variance
A measure of variation equal to the square of the deviations
Experiment
Researchers apply some treatment to subjects in a study and observe the effects of the treatment
Sample
A subset of observations selected from the population
Estimator
A statistic used to estimate the value of a population parameter
Histogram
A graph that displays data using continuous vertical bars that represent the frequencies of classes
Data
A collection of observation, measurements or counts
Median
The middle number of a ranked set of data
Range
The difference between the maximum and minimum value in the data set
Pie Graph
A circle graph that is divided into section which are proportional to the frequencies in each category
Mode
The number that occurs most frequently in a data set
Bimodal
A data set with two modes
Compound Event
Any event combining two or more simple events
Ogive
A graph that represents the cumulative frequencies for classes in a frequency distribution
Midrange
The sum of the highest data value and the lowest data value divided by two
Event
Any collection of results or outcomes of an experiment
Paretochart
A chart used to represent the frequencies of categorical variables by displaying the heights of the variables using vertical bars that are arranged in order
Statistics
The science of organizing, summarizing, analyzing and interpreting data to from a conclusion
Random Variable
A variable that has a single numerical value and is determined by some chance for each outcome of an experiment
Z-Score
The number of standard deviations that a given x-value is above or below the mean
Sample Space
All possible outcomes for an event
Random Variable
A variable that has a single numerical value and is determined by some chance for each outcome of an experiment
Population
A collection of all observations of interest
Statistic
The numerical measurement that describes a sample
Qualitative Data
Data that consists of names/labels or categories to represent counts or measurements
Dependent Events
The occurrence of one event affects the probability of another event occurring
Class Width
The difference between the upper and lower class limits in a frequency distribution
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