During one semester of a healthy living class taught at Hope College, students w

Question

During one semester of a healthy living class taught at Hope College, students were weighed under water (in kilograms). This was done at the beginning of the semester and again at the end of the semester. The data can be found here:

http://bcs.wiley.com/he-bcs/Books?action=mininav&bcsId=10008&itemId=1118172140&assetId=405213&resourceId=39871&newwindow=true

Copy and paste URL then click on Chapter 7 "Water weight" to view the data above.

A. What is the P-Value

B. What can we conclude from the data?

C. Provide suggestions for improving or suggestions for future analysis

Explanation / Answer

A. What is the P-Value

p-value is 0.0000 (very small)

B. What can we conclude from the data?

since p-value is less than 0.05

we conclude that there is significant evidence that weight before and after is different ,in fact it has increased

t-Test: Paired Two Sample for Means Variable 1 Variable 2 Mean 2.558988764 2.745505618 Variance 1.765370723 1.743736749 Observations 178 178 Pearson Correlation 0.963619661 Hypothesized Mean Difference 0 df 177 t Stat -6.962850924 P(T<=t) one-tail 3.14037E-11 t Critical one-tail 1.653508002 P(T<=t) two-tail 6.28074E-11

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