Question

Question 3 The two histograms below were published by Yasuda et. al. in 20081. The histograms show the levels of aluminum in hair samples taken from children 0-15 on the left, and the levels of aluminum in hair samples taken from adults 21-40 years old on the right. Researchers were interested in this data because high levels of aluminum are known to be poisonous to the human nervous system. Number 400 350 300 250 200 150 100 50 0 Number 140 120 100 80 60 40 20 0 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 Log Al Log Al above left: aluminum present in hair sample for male children 0-15 years old above right: aluminum present in hair sample for male adults 21-40 old The sample size for the left histogram was 1,276, and the sample size for the right histogram was 436. You may give the units for the horizontal axis as "Logs." For example, about 300 children had a reading of 3.8 Logs based on the histogram above and to the left. A) What was the mode for Logs of Aluminum in the sample of children 0-15 years old? B) Estimate or give the exact median (either choice is fine) for Logs of Aluminum in the sample of adults 21-40. Explain how you found your answer. C) Describe the shape of the two histograms using vocabulary from our first unit.

          Question 3
The two histograms below were published by Yasuda et. al. in 20081. The histograms show the levels
of aluminum in hair samples taken from children 0-15 on the left, and the levels of aluminum in hair samples
taken from adults 21-40 years old on the right. Researchers were interested in this data because high levels of
aluminum are known to be poisonous to the human nervous system.
Number
400
350
300
250
200
150
100
50
0
Number
140
120
100
80
60
40
20
0
2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4
Log Al
Log Al
above left: aluminum present in hair sample for male children 0-15 years old
above right: aluminum present in hair sample for male adults 21-40 old
The sample size for the left histogram was 1,276, and the sample size for the right histogram was 436. You
may give the units for the horizontal axis as "Logs." For example, about 300 children had a reading of 3.8 Logs
based on the histogram above and to the left.
A)
What was the mode for Logs of Aluminum in the sample of children 0-15 years old?
B)
Estimate or give the exact median (either choice is fine) for Logs of Aluminum in the sample of adults
21-40. Explain how you found your answer.
C)
Describe the shape of the two histograms using vocabulary from our first unit.

Question 3
The two histograms below were published by Yasuda et. al. in 20081. The histograms show the levels
of aluminum in hair samples taken from children 0-15 on the left, and the levels of aluminum in hair samples
taken from adults 21-40 years old on the right. Researchers were interested in this data because high levels of
aluminum are known to be poisonous to the human nervous system.
Number
400
350
300
250
200
150
100
50
0
Number
140
120
100
80
60
40
20
0
2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0
2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4
Log Al
Log Al
above left: aluminum present in hair sample for male children 0-15 years old
above right: aluminum present in hair sample for male adults 21-40 old
The sample size for the left histogram was 1,276, and the sample size for the right histogram was 436. You
may give the units for the horizontal axis as "Logs." For example, about 300 children had a reading of 3.8 Logs
based on the histogram above and to the left.
A)
What was the mode for Logs of Aluminum in the sample of children 0-15 years old?
B)
Estimate or give the exact median (either choice is fine) for Logs of Aluminum in the sample of adults
21-40. Explain how you found your answer.
C)
Describe the shape of the two histograms using vocabulary from our first unit.

Added by Tracey H.

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