Laboratory Exercise- Statistical Analysis

1) Use the t-Test spreadsheet prepared for this course and perform a 1-tailed t-test on the mouse weight data in the What is Science? reading assignment. Verify that your analysis produces the same results as above. Turn in a printout of your spreadsheet analysis. Online students may wish to copy and paste the spreadsheet into a word processor document.

2) Perform a t-test on the pH data (the line graph data) to determine if the pH in the morning (1:00 to 11:00 AM) is different than the pH in the afternoon (1:00 PM to 11:00 PM). 
Click here for some examples of statistical analysis using a t-test.

a) Explain why this is a 2-tailed test. (See 2-tailed test above.)

b) State the hypothesis being tested for this analysis: (Click here for more information on constructing a hypothesis.)

c) Based on the results of the t-test, do you accept your hypothesis or do you reject your hypothesis? (See Some Examples of Statistical Analysis Using a t-test.)

d) Why did you accept (or reject) your hypothesis? [Hint- You must consult the probability from the t-test before you can answer this question.] (See Some Examples of Statistical Analysis Using a t-test.)

e) Attach a printout of your spreadsheet analysis. Be sure that your analysis is for a 2-tailed test.