The Table Below Shows the Mean Number of Daily Errors $\quad$

question 42

Multiple Choice

The table below shows the mean number of daily errors by seven air traffic controller trainees during the first two weeks on the job. We want to perform a paired t-test at ? = .05 to see if the mean daily errors have decreased from Week 1 to Week 2. $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Trainee }$
$\begin{array}{|c|c|c|c|c|c|c|c|}\hline&\text { T1 } & \text { T2 } & \text { T3 } & \text { T4 } & \text { T5 } & \text { T6 } & T 7 \\\hline \text { Week 1 }&5.1 & 3 & 12.1 & 6.2 & 11.5 & 7.8 & 2.2 \\\hline \text { Week 2}&3.2 & 2.2 & 8.7 & 7.7 & 9.4 & 7.8 & 3.1 \\\hline\end{array}$ The right-tailed critical value at ? = 0.05 is:

• A)1.895
• B)1.943
• C)2.447
• D)2.365

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Definitions:

Earned Surplus

Profits that a company has retained rather than distributed to shareholders, typically used for reinvestment in the business or to pay down debt.

Undistributed Profits

Profits earned by a company that have not been paid out as dividends to shareholders and are retained for reinvestment.

Earned Surplus Test

A financial analysis method used to determine a company's ability to declare dividends based on its accumulated, undistributed profits.

Capital Surplus

Represents the amount received by a company from the sale of shares above their par value, often reflecting the excess of invested capital over the nominal value of equity.