The grade point averages (GPA) of 15 randomly selected college students are 2.3, 3.3, 2.6, 1.8, 0.2, 3.1, 4.0, 0.7, 2.3, 2.0, 3.1, 3.4, 1.3, 2.6, 2.6 1. The sample mean is (Round to one decimal place) 2. The sample standard deviation is (Round to one decimal place) 3. The sample size is 4. The degree of freedom for the Studentized version of the sample mean is 5. The point estimate for the mean GPA of ALL students at this college is 6. The t-value for a 99% confidence interval is t= 7. The Margin of error for a 99% confidence interval for this sample is (Round to one place) 8. The 99 % confidence interval estimate of the mean GPA of students at this college is (Round to one decimal place)

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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.