Researchers collected 16 specimens from a mine reservoir. That amount of dioxide

Question

Researchers collected 16 specimens from a mine reservoir. That amount of dioxide (milligrams/liter) and presence/absence of crude oil was determined for each of 16 specimens. The data are repeated in the accompanying table,

Dioxide Amount     Crude Oil Present

3.3                          No

0.5                          Yes

1.3                          Yes

0.4                          Yes

0.1                          No

4.0                          No

0.3                          No

0.2                          Yes

2.4                          No

2.4                          No

1.4                          No

0.5                          Yes

0.2                          Yes

4.0                           No

4.0                           No

4.0                           No

(a) Find the mean dioxide level of the 16 water specimen.

(b) Find the median dioxide level of the 16 water specimen.

(c) Find the mode of the 16 dioxide levels.

(d) Find the median dioxide level of the 10 water specimen with no crude oil present.

(e) Find the median dioxide level of the 6 water specimen with crude oil present.

(f) Compare the results in parts

Q.1d and Q.1e. Explain the relation between dioxide level and presence/absence of crude oil.

Explanation / Answer

a)

Mean of Dioxide amount = 1.8125

b)Median of Dioxide amount = 1.35

c)mode =6

d)Median of no crude oil present = 2.85

e) Median of ceude oil present = 0.45

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