3. A professor of statistics teaches one class through conventional method and the other class with the use of computers. Sometimes, those taught the conventional method got high scores and there are times that those taught with computers outshine in the subject. Taking a sample of 15 corrected papers from the first class and 10 from the second class, the professor wants to test, at 1% level of significance, that those taught with computers perform better. The sample mean for the conventional method is 84 and 92 for the second class. The sample standard deviation for the conventional method is 8 and 5 for the second class. Run the test for the professor's claim.
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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