One Sample t-test ENV710 Elizabeth A. Albright,

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One Sample t-test ENV710 Elizabeth A. Albright, PhD Nicholas School of the Environment Duke University General Steps in Conducting a Comparison of Means Test 1. Decide type of comparison of means test. (one sample, two sample, paired

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01
One Sample t-test ENV710 Elizabeth A. Albright, PhD
Nicholas School of the Environment
Duke University<br>
02
General Steps in Conducting a Comparison of Means Test 1.  Decide type of comparison of means test.
         (one sample, two sample, paired samples)
 
2.  Decide whether a one- or two-sided test.
 
3.  Examine the appropriateness of a comparison of means test (based on the assumptions)***
 
4.  Establish null and alternative hypotheses.
 
5.  Decide whether a z-statistic or t-statistic is appropriate.<br>
03
6.  Calculate sample mean(s).
 
7.  Calculate standard deviation of sample IF using a t-test.
 
8.  Calculate standard error.
 
9.  Calculate z-statistic or t-statistic.
 
10.  Determine p-value from the test statistic using the appropriate z or t distribution.
 
11.  Interpret the p-value in terms of the hypotheses established prior to the test. General Steps in Conducting a Comparison of Means Test<br>