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Perform hypothesis testing on one variable's data

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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

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Hint: Test a claim that American workers have an intrinsic job satisfaction mean level of 5.0
Using Microsoft excel
Add - Ins  Megastat Descriptive statsitics
Descriptive statistics

count 25
mean 5.132
sample variance 0.778
sample ...

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The solution examines performing hypothesis testing on one variable data.