Ashley R. Singer
Population- the entire group being studied
Sample- part of the population being studied
Biased sample- bad representation of the population
Random sample- Every member of the population has an equal chance of being chosen
Systematic sample- A sampling method in which the members of the sample are chosen by a rule or formula
Stratified sample- A sampling method in which the members of the sample are chosen at random from randomly chosen subgroups
Mean- The sum of the values, divided by the number of values
Median- if an odd number of values: the middle number, if an even number of values: the average of the two middle values
Mode- the value or values that occur most often
Outlier- an extreme value
Bar Graph- a good way to display data that can be grouped in categories
Frequency table- a way to organize data if the data are given in the form of a list
Histogram- a type of bar graph where the bars represent intervals in which the data are grouped
Line graph- often used to show trends or to make estimates for values between data points
Scatter plot- shows relationships between two sets of data
Correlation- describes the type of relationship between two data sets
Line of best fit- line that comes closest to all the points on a scatter plot
Btu- British thermal unit
kWh- kilowatt-hours
Electricity- a fundamental form of energy observable in positive and negative forms that occurs naturally (as in lightning) or is produced (as in a generator) and that is expressed in terms of the movement and interaction of electrons
Fossil Fuels- a fuel (as coal, oil, or natural gas) formed in the earth from plant or animal remains
Hydroelectric power- of or relating to production of electricity by waterpower
Solar power- radiation from the sun capable of producing heat, causing chemical reactions, or generating electricity
Geothermal power- of, relating to, or utilizing the heat of the earth's interior; produced or permeated by such heat
Wind Power- form of energy conversion in which turbines convert the kinetic energy of wind into mechanical or electrical energy that can be used for power
