Approximate the Variance and Standard Deviation of a Variable from Grouped

question 94

Multiple Choice

Approximate the Variance and Standard Deviation of a Variable from Grouped Data
-For the following data set, approximate the sample standard deviation of emails per day. $\begin{array}{c|c}\text { Emails (per day) } & \text { Frequency } \\\hline 8-11 & 18 \\12-15 & 23 \\16-19 & 38 \\20-23 & 47 \\24-27 & 32\end{array}$

• A) \(5.1\) emails
• B) \(4.0\) emails
• C) \(25.8\) emails
• D) \(19.3\) emails

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Definitions:

Expected Earnings

The forecasted profits of a company, often used by investors to make investment decisions.

Annual Coupon

The annual percentage rate of interest a bond pays, based on its face value.

Debt-Equity Ratio

A financial proportion indicating the use of debt versus equity in the capital structure for asset financing.

Cost of Equity

The return that investors require or expect to earn on their investment in a company's equity to compensate for the risk they undertake.