MAT-144 Mission Project: Part C

Answer the following based on the data presented in the included Part C Data spreadsheet. You will use the analysis you complete here to prepare a written report of your findings. Be sure to submit your written report and completed worksheet to your instructor.

1) Record the mean and median of each group of samples.

a. Original sample collected by mission team
i. Mean
ii. Median
b. Villager supplied sample
i. Mean
ii. Median
c. Student biologist collected sample
i. Mean
ii. Median

MAT-144 Mission Project: Part C

2) Look at the box plots and histograms for each of the datasets. Record any differences you notice in the charts. Does it appear from the charts that the villagers have access to cleaner water after the mission?

3) The mission team wants to do a statistical test to support whether or not the villagers have access to cleaner water. State the null and alternative hypotheses that can be used to test the data.

4) The results of a statistical test to compare the means of the samples are shown on the spreadsheet. Determine if there is statistically significant evidence that the means are different at the ? = 0.05 level.

MAT-144 Mission Project: Part C