Colin Has Computed the Variance for His 10 Raw Scores $S_{X}^{2}$

question 18

Multiple Choice

Colin has computed the variance for his 10 raw scores and obtained = 16.37.He then computed $S_{X}^{2}$ $S \bar{X}$ as follows: $s \bar{x}=\sqrt{\frac{4.046}{10}}=0.636$ What is wrong?

• A)Colin first took the square root of \(S_{X}^{2}\) and put this into the formula for \(S \bar{X}\) .He should have used the \(S_{X}^{2}\) = 16.37 value.
• B)Colin should have divided here by N - 1.
• C)Colin should not have taken the square root of 4.046/10 because he needs \(S_{X}^{2}\) in the formula for the t-test.
• D)There is nothing wrong with the way Colin has done this problem.

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Definitions:

Available Technology

The current state of technological advances and machinery available to businesses for production purposes.

Opportunity Cost

The cost of the next best alternative foregone when making a decision.

Production Possibilities Frontier

A graph that shows the combinations of two goods that an economy can produce using all available resources and technology efficiently.