A sample of n = 25 taxi drivers was selected at random to draw conclusions about their average daily wages. Individual records are assumed to be independent normally distributed with unknown population standard deviation. Sample summaries were found as Mean = 83.80 and Sample SD = s = 12.5 1. At significance level a = 1%, is there sufficient evidence to conclude that the population average is below 90? Show critical value, test statistic, and state the rejection rule that explains your decision 2. At significance level a = 10%, is there evidence to conclude that the population average is above 80? Show critical value, test statistic, and state the rejection rule that explains your decision 3. Estimate the population average with confidence C = 0.95. Show critical value, margin of error, and confidence limits

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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.

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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.