2. (Sampling) For the following questions, determine the type of sampling used (simple random, stratified, systematic, cluster, or convenience). Clustered (a) A group of test subjects is divided into twelve groups; then four of the groups are chosen at random. |(b) A market researcher polls every tenth person who walks into a store. Systematic (c) The first 50 people who walk into a sporting event are polled on their television preferences. Simple Random
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.
answer to questions 2a 2b 2c 2d and 3a 3b
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