statistics explanation

Answer the following questions about the AGE variable found in the Lab 2 data set provided with this lab.
1) how does the standard error of the mean change when using different sample sizes? (use a 10%, 25%, 50%, 75%, and full sample- “All Cases”);
2) explain in your own words why the standard error of the mean changes as you increase the sample size;
3) what effect would these changes in the standard error of the mean have on a computed Z score;
4) what effect would those changed Z- scores have on your ability to accept/reject the null hypothesis in your research? Use your outputs from each sample size to support your statements.
Here is the data that you need for ansawering the questions:

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