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# Formative Guide #1

is a collection of methods for planning experiments, obtaining data, and then organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on the data. Statistics
is the complete collection of elements to be studied. Population
is a sub-collection of elements drawn from a population. Sample
are things that describe a sample’s contents. Descriptive Statistics
is making inferences about what sample data may indicate about a population Inferential Statistics
data can be separated into different categories distinguished by some non-numerical characteristic. Qualitative
data consists of numbers representing counts or measurements. Quantitative
data result from either a finite number of possible values or a countable number of possible values. Discrete
numerical data results from infinitely many possible values that can be associated with measurement error. Continuous
sampling is when members of the population are selected in such a way that each has an equal chance of being selected. Random
sampling is when you subdivide the population into at least two different sub-populations that share the same characteristics and then draw a sample from each subgroup. Stratified
are numbers that describe a population. Parameters
are numbers that describe a sample. Statistics
sampling is when you divide the population into sections and randomly select some of those sections, and then choose all the members from the selected sections. Cluster
sampling is when you choose some starting point and then select every kth element in the population. Systematic
is when the mean is significantly less than the median. Left Skewed
is when the mean is significantly greater than the median. Right Skewed
asking people their political affiliation State of residence Gender Nominal
rating how good a movie is by awarding it one, two, three or four stars Letter grade in a class (A, B, C, D, or F) Size of soft drink ordered at a restaurant (small, medium, large) Ordinal
measuring the temperature in Fahrenheit Interval
measuring the time it takes to run a race Ratio
x with a line over it is known as Mean
Sx = (x is only on calculator, standard symbol is "s") Standard Deviation
number that appears most often in the set. Mode
Med = Median
the difference between the highest and lowest values in the set. Range
Standard Deviation Squared = Sample Variance
Greek sigma x = Population Deviation
Created by: Joel.olivio