A 50 item true-false pretest is given to a group of 30 students before instruction. The same test is given to the students after instruction. The students must answer at least 25 items correctly to pass the course. On item #4, 22 students answered correctly on the pretest and 20 students answered correctly on the posttest. What is the index of sensitivity to instructional effects for item #4?
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
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