A Researcher Selected a Sample of 24 Participants and Observed

question 18

Multiple Choice

A researcher selected a sample of 24 participants and observed their behavior at two times.The result of a related samples t test at a .05 level of significance was t = 2.68.Which of the following correctly describes the result of this test?

• A)A related samples t test is the correct tests for this study;the result of the test is not significant
• B)A related samples t test is the correct tests for this study;the result of the test is significant
• C)The result of the test cannot be appropriately interpreted because the related samples t test was not the correct test for this study;the researcher should have computed a two-independent sample t test
• D)The result of the test cannot be appropriately interpreted because the related samples t test was not the correct test for this study;the researcher should have computed a one-sample t test

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Definitions:

Interval Estimate

An estimation that specifies a range within which a parameter lies, providing an interval believed to encompass the true value of that parameter.

Sample Mean

The average of all the values in a sample set of data.

Confidence Interval

A span of values, taken from sample statistics, seen as likely to encase the value of an unidentified population parameter.

Confidence Level

The probability, expressed as a percentage, that a parameter lies within a specified range of values (confidence interval).