Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the survey, assume the mean annual salary for graduates 10 years after graduation is $120,000. Assume the standard deviation is $45,000. Suppose you take a simple random sample of 40 graduates. Round all answers to four decimal places if necessary. a. What is the distribution of X? X N( 120000 45000 b. What is the distribution of ? a N( 120000 7115 c. For a single randomly selected graduate, find the probability that her salary is between $123,027 and $131,085. d. For a simple random sample of 40 graduates, find the probability that the average salary is between $123,027 and $131,085. e. For part d), is the assumption of normal necessary? O YesO No

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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.