2. Suppose a market analyst wants to determine the difference in the average price of a gallon of whole milk in Seattle and Atlanta. To do so, he takes a telephone survey of 21 randomly selected consumers in Seattle who have purchased a gallon of milk and asks how much they paid for it. The analyst undertakes a similar survey in Atlanta with 18 respondents. Assume the population variance for Seattle is 0.03, the population variance for Atlanta is 0.015, and that the price of milk is normally distributed. Using the resulting sample information that follows, Compute a 99% confidence interval to estimate the difference in the mean price of a gallon of milk between the two cities. b. a. Using a 1% level of significance, test to determine if there is a significant difference in the price of a gallon of milk between the two cities. SEATTLE ATLANTA $2.55 $2.36 $2.43 $2.25 $2.40 $2.39 2.67 2.54 2,43 2.30 2.33 2.40 2.50 2.54 2.38 2.49 2.29 2.23 2.61 2.80 2.49 2.41 2.48 2.29 2.43 2.61 2.57 2.39 2.59 2.53 2.36 2.56 2.71 2.26 2.38 2.45 2.50 2.64 2.27

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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.