A study examined environmental factors associated with biodegradation in crude oil reservoirs. Amount of dioxide(milligrams/liter) and presence/absence

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A study examined environmental factors associated with biodegradation in crude oil reservoirs. Amount of dioxide(milligrams/liter) and presence/absence of crude oil was determined for each of 16 water specimens collected from a mine reservoir. The data are repeated in the accompanying table. Complete parts a through f below.

Dioxide Amount	Crude Oil Present
3.2	No
0.7	Yes
1.4	Yes
0.3	Yes
0.1	No
4.3	No
0.2	No
0.3	Yes
2.5	No
2.5	No
1.6	No
0.5	Yes
0.5	Yes
4.5	No
4.5	No
4.5	No

a. Find the mean dioxide level of the 16 water specimens. Interpret this value.

The mean is _____.(Round to two decimal places as needed.)

Interpret the mean.

A. This value is the average dioxide level found in the water specimens.

B. This value is the total dioxide level found in the water specimens.

C. This value is the most common dioxide level found in the water specimens.

D. This value is the middle dioxide level found in the water specimens.

b. Find the median dioxide level of the 16 water specimens. Interpret this value.

The median is _______. (Round to two decimal places asneeded.)

Interpret the median.

A. This value is the most common dioxide level found in the water specimens.

B. This value is the total dioxide level found in the water specimens.

C. This value is the middle dioxide level found in the water specimens.

D. This value is the average dioxide level found in the water specimens.

c. Find the mode of the 16 dioxide levels. Interpret this value.

The mode(s) is(are) ______(Round to two decimal places as needed. Use a comma to separate answers as needed.)

Interpret the mode.

A. This value is the average dioxide level found in the water specimens.

B. This value is the most common dioxide level found in the water specimens.

C. This value is the middle dioxide level found in the water specimens.

D. This value is the total dioxide level found in the water specimens.

d. Find the median dioxide level of the 10 water specimens with no crude oil present.

The median is ______. (Round to two decimal places asneeded.)

e. Find the median dioxide level of the 6 water specimens with crude oil present.

The median is _______.(Round to two decimal places asneeded.)

f. Compare the results of parts d and e.

Make a statement about the association between dioxide level and presence/absence of crude oil.

A. The median dioxide level was lower for the specimens with no crude oil present, meaning that dioxide levels tend to be greater when crude oil is present.

B. The median dioxide level was higher for the specimens with no crude oil present, meaning that dioxide levels tend to be less when crude oil is present.

C. The median dioxide level was higher for the specimens with no crude oil present, meaning that dioxide levels tend to be greater when crude oil is present.

D. The median dioxide level was lower for the specimens with no crude oil present, meaning that dioxide levels tend to be less when crude oil is present.