Biological oxygen demand (BOD) is a pollution index that is monitored in the treated effluent of paper mills. BOD measur

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Biological oxygen demand (BOD) is a pollution index that is
monitored in the treated effluent of paper mills. BOD measures the
amount of oxygen required to completely oxidize all the organics in
one liter of water. High levels of BOD can be hazardous to aquatic
life because the oxygen that would normally be used for their
respiration is taken away and used to decompose these organic
materials. A certain paper mill has taken 30 samples over the past
3 months. the mean and standard deviation for the sample data are
3.13 and 1.094 ppm respectively. The mill would like to see if this
sample indicates that the true average BOD in their treated
effluent exceeds the targeted 3.00 ppm. Let 𝛼 =
0.1.
A) The necessary degrees of freedom for this study
is:


B) The test statistic, (ttest), for this data set
is:
Note: Round your answer to the
nearest hundredth.


C) The p-value is: ____