Exhibit 20

question 85

Multiple Choice

Exhibit 20.12.A magician has a coin that may or not be fair.The results of 30 flips of the coin are: H H T H T H H T H H T H H T H T H H H T T T T T H H H H H T. Refer to Exhibit 20.12.Using the critical value approach,appropriate conclusion is:

• A)Do not reject the null hypothesis,cannot conclude the coin is not fair
• B)Reject the null hypothesis,the coin is not fair
• C)Reject the null hypothesis,cannot conclude the coin is not fair
• D)Do not reject the null hypothesis,the coin is not fair

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Definitions:

Significant Change

A notable or considerable difference in data or results that exceeds the expectations of random variation.

P-Value

A probability that provides a measure of the evidence against the null hypothesis given by the sample. Smaller p-values indicate more evidence against H0. For a lower tail test, the p-value is the probability of obtaining a value for the test statistic as small as or smaller than that provided by the sample. For an upper tail test, the p-value is the probability of obtaining a value for the test statistic as large as or larger than that provided by the sample. For a two-tailed test, the p-value is the probability of obtaining a value for the test statistic at least as unlikely as or more unlikely than that provided by the sample.

Degrees of Freedom

The number of independent values or quantities that can be assigned to a statistical distribution or to a statistical calculation.

Data Table

A structured arrangement of data organized in rows and columns, which can be used for analysis or presentation.