Friday

March 27, 2015

March 27, 2015

Posted by **kim** on Saturday, May 3, 2008 at 5:43pm.

A sample of the near-ground air concentration of caesium-137 at

11 locations in southern Germany a few days after the Chernobyl nuclear

accident in 1986 consisted of the following measurements (in Bq/m3).

5.77

3.30

7.98

8.29

4.85

2.90

1.74

0.05

0.23

0.60

4.98

1)Choose the option that gives the median concentration within the

sample.

Options for Question 1

A) 0.60 B) 2.90 C) 3.10

D) 3.30 E) 3.70 F) 5.77

2)Choose the option that gives the lower quartile for the near-ground air

concentration within the sample.

3)Choose the option that gives the upper quartile for the near-ground

air concentration within the sample.

Options for Questions 2 and 3

A) 0.23 B) 0.60 C) 1.74 D) 3.30

E) 4.98 F) 5.77 G) 7.98 H) 8.29

- maths -
**PsyDAG**, Sunday, May 4, 2008 at 10:12amArrange the scores in order of their value. In this order, the sixth value will be the median — 50% (half) of the scores will have a higher value and 50% will have a lower value. If there are two middle-most scores, the median would be the mean of those two scores.

The lowest quartile is the lowest 25% or lowest quarter. 11/4 = 2.75, so 2.75 or rounded to 3, would be the number of scores in the lowest quartile.

At the high end, the same would be true of the highest quartile.

I hope this helps. Thanks for asking.

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