A Researcher Obtains Z = 1

question 51

Multiple Choice

A researcher obtains z = 1.45 for a one-sample z test.What is the decision for this test at a .05 level of significance?

• A) to reject the null hypothesis
• B) to retain the null hypothesis
• C) it depends on whether the test is one-tailed or two-tailed
• D) there is not enough information to make a decision

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Definitions:

Margin of Error

A statistic expressing the amount of random sampling error in a survey's results.

Sample Mean

The average value of a set of observations derived from a sample.

Standard Deviation

An indicator of the spread or distribution range of a collection of data points, showing how far apart the values in the set are from each other.

Margin of Error

The maximum amount by which the sample results are expected to differ from the true population value.