Elementary Practical Statistics by A. L. O'Toole

By A. L. O'Toole

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Place a third group in a room in which popular semiclassical music will be played. Place the fourth group in a room where fast, loud jazz music will be played. Give all four groups of students the same assignment say, in history and permit them to study it for one hour. If you want to obtain data on the speed of reading as well as on the quantity of information learned, ask each student to record the time at which he or she finished reading the assigned material. At the end of the hour, give all four groups of students a test containing, say, fifty questions about the material in the assignment.

4] units in a sample are: Democrat); marital widowed, divorced, separated) condition of health handedness (right-handed, left-handed, ambidextrous) political affiliation (Republican, status (married, single, (good, poor) fair, ; 29 ; ; nondefective; vaccinated, not vaccinated; accepted, rejected; defective, airman, marine; blonde, brunette, redhead; wool, cotton, synthetic geographical regions, for example, east of the Mississippi, west of the Mississippi, the North, the South. You can add other citizen, alien; soldier, sailor, silk, ; truly nonquantitative classifications to this list for yourself.

74] Statistical 23 Methods the method of acquiring new knowledge is that of inductive inductive logical procedure is a method of reasoning from observed facts to the inferences that those facts warrant. Here, a statement In statistics, inference. The considered as acceptable or unacceptable insofar as it meets or fails to tests of inductive logic; the test of truth or acceptability is not deductive proof. is meet the The key element in the process of inductive reasoning in statistics is the idea of probability; a statement is acceptable if it is based on observations obtained in such a way that the probability is very great that the statement is true and very small that the statement is false.

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