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Context of the data;
Source of the data;
Parameter vs. Statistic
In a large sample of households, the median annual income per household for high school graduates is $19,856 (based on data from the U.S. Census Bureau).
A study of all 2223 passengers aboard the Titanic found that 706 survived when it sank.
If the areas of the 50 states are added and the sum is divided by 50, the result is 196,533 square kilometers.
The author measured the voltage supplied to his home on 40 different days, and the average (mean) value is 123.7 volts.
Discrete or Continuous Data Set
In New York City, there are 3250 walk buttons that pedestrians can press at traffic intersections, and 2500 of them do not work. (based on..._
The amount of nicotinein a Marlboro cigarette is 1.2 milligrams.
In a test of a method of gender selection developed by the Genetics & IVF Institute, 726 couples used the XSORT method and 668 of them had baby girls.
When a Cadillac STS is randomly selected and weighed, it is found to weigh 1827.9 kg.
Nominal, Ordinal, Interval, Ratio
Voltage measurements from the author's home
Critic ratings of movies on a scale from 0 star to 4 stars
Companies (Disney, MGM, Warner Brothers, Universal, 20th Century Fox) that produced the movies listed in Data Set 7 in Appendix B.
Years in which movies were released, as listed in Data Set 9 in Appendix B.
Formulas for the
variance - easier to understand
variance - easier computations
for a probability distribution
Rare event rule for inferential statistics
Requirements for a density curve
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