2. FIU is interested in the effectiveness of teacher training classes on the quality of instruction in discussion sections. The administrators have decided to use a study with a matched, experimental design to explore this problem. Thirty professors took an intensive teacher-training class before the Fall '14 semester began and they were paired with professors teaching the same courses who did not take the intensive training class. Course evaluations were compared at the end of the semester, and the mean advantage for those who took the course compared to their matched counterparts was 1 point on ratings of the question "The instructor is an excellent teacher." The standard deviation of this difference was 2.5. Do teacher training classes improve teaching evaluations? Use a 1% significance level. Show your work for all 4 steps in hypothesis testing. Be sure to include diagrams and to determine and interpret the n-value for vour test-
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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