Exhibit 20

question 25

Multiple Choice

Exhibit 20.9.A shipping company believes there is a linear association between the weight of packages shipped and the cost.The following table shows the weight (in pounds) and cost (in dollars) of the last 7 packages shipped. Refer to Exhibit 20.9.Using the critical value approach,the appropriate conclusion is:

• A)Do not reject the null hypothesis,conclude weight and cost are correlated
• B)Do not reject the null hypothesis,cannot conclude the is different from zero
• C)Reject the null hypothesis,cannot conclude the correlation coefficient is different from zero
• D)Reject the null hypothesis,conclude weight and cost are correlated

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Definitions:

Serratus Anterior

A muscle that originates on the surface of the upper eight or nine ribs and inserts along the entire anterior length of the medial border of the scapula, playing a crucial role in the movement and stabilization of the shoulder.

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is actually true; a measure of the threshold of statistical significance.

Test Statistic

A standardized value calculated from sample data, used to determine whether to reject the null hypothesis in hypothesis testing.

Critical Value

A point on the scale of the test statistic beyond which we reject the null hypothesis in hypothesis testing.