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An educational psychologist is interested in determining whether attitudes toward school change with age.She
selects 30 seventhgraders, 30 ninthgraders, and 30 eleventhgraders and administers a "Do you like school?" test.
a.How many factors does this experiment have?
b.How many levels are there in the experiment?
c.What is the N in this experiment?
Expression
A combination of numbers, variables, operators, and sometimes parentheses that represents a value or quantity.
Decimal Notation
A way of expressing numbers that uses a decimal point to separate the whole part from the fractional part.
Expression
A combination of symbols and numbers that represent a mathematical operation or relation.
Difference
The result of subtracting one number from another, or the operation of subtraction itself.
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