# Samples and survey responses

Using AIU's large database of survey responses from the AIU data set, complete the following:

Perform hypothesis testing on one variable's data. (Choose either the intrinsic or extrinsic column.) Perform a t-test by formulating a null and an alternative statement, choosing an acceptable significance value, determining the appropriate critical value, selecting the test statistic and determining its value from the sample data, comparing the observed value to the critical value obtained and determining whether to reject or fail to reject the null hypothesis.

In a separate paragraph, provide some information on when to use a t-test and when to use a z-test and why. Also, provide some information about why samples are used instead of populations.

Be sure to provide references in APA format for any resource you may use.

Objective:

Compute mean, median, mode for a set of data.

Formulate null and alternative hypotheses for applications involving a single population mean, proportion, or variance.

Use effective communication techniques.

Instructor Comments:

Unit 3 IP:

The assignment is a hypothesis test for a single population mean of a quantitative variable equal to a given number (Chapter 8). For example, test the hypothesis that the population mean of the intrinsic is equal to 5 or not. Use all 25 data rows! Since n<30, use a t statistic! For this and any hypothesis test, I want you to number the five steps as in the book. Please provide the following summary table.

Unit 3 IP:

The assignment is a hypothesis test for a single population mean of a quantitative variable equal to a given number (Chapter 8). For example, test the hypothesis that the population mean of the intrinsic is equal to 5 or not. Use all 25 data rows! Since n<30, use a t statistic! For this and any hypothesis test, I want you to number the five steps as in the book. Please provide the following summary table.

Null and Alternative Hypotheses H0:

H1:

Significance Level

Degrees of freedom

Critical Value Î±=

df=

tcrit=

Test Value t=

Decision

Write this as a coherent integrated report in Word with an introduction, description of methods, results, interpretation of results, and conclusion, with references.

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#### Solution Summary

Samples and survey responses are examined. The coherent integrated report is given.