(WMM11 9.47) Fortune magazine (March 1997) reported the total returns to investors for the 10 years prior to 1996 and also for 1996 for 431 companies. The total returns for 10 of the companies are listed below. Company Соса-Cola 1986–96 1996 29.8% 27.9% 43.3% 25.4% 24.0% 88.3% 18.1% 131.2% Mirage Resorts 22.1% 44.5% 22.2% 43.8% 21.7% 21.9% 28.3% 11.8% Merck Microsoft Johnson & Johnson Intel Pfizer 34.0% 32.1% 6.2% 20.3% Procter & Gamble Berkshire Hathaway S&P 500 Note: You have to properly import the data given as a separate csv file in R to solve this question. 4. Find a 95% confidence interval for the mean change in percent return to investors.

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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.