Anernia (low healthy blood cells or hemoglobin) has an important role in exercise performance. However, the direct link between rapid changes of hemoglobin and exercise performance is still unknown. A study investigated 18 patients with a blood disorder (beta-thalassemia). Participants in the study performed an exercise test before and the day after receiving a blood transfusion. Data are given in the table. RER > 1.1 HB = Hemoglobin RER = Respiratory exchange Obese Change in HB -1.4 ID %3D ratio 1 No No -1.5 No No No Yes No -2 -2.1 No Yes Yes 4 -1.9 11.6 Yes No Yes Yes 6. 1.8 -0.8 No No No No No Yes 8. 9. -1 -1.2 0.8 1.5 -1.4 2.6 -1.7 No 10 Yes No 11 12 13 No No 14 15 16 17 18 Yes Yes Yes Yes No No No No No Yes Yes -2.6 2.7 1.5
Anernia (low healthy blood cells or hemoglobin) has an important role in exercise performance. However, the direct link between rapid changes of hemoglobin and exercise performance is still unknown. A study investigated 18 patients with a blood disorder (beta-thalassemia). Participants in the study performed an exercise test before and the day after receiving a blood transfusion. Data are given in the table. RER > 1.1 HB = Hemoglobin RER = Respiratory exchange Obese Change in HB -1.4 ID %3D ratio 1 No No -1.5 No No No Yes No -2 -2.1 No Yes Yes 4 -1.9 11.6 Yes No Yes Yes 6. 1.8 -0.8 No No No No No Yes 8. 9. -1 -1.2 0.8 1.5 -1.4 2.6 -1.7 No 10 Yes No 11 12 13 No No 14 15 16 17 18 Yes Yes Yes Yes No No No No No Yes Yes -2.6 2.7 1.5
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Transcribed Image Text:1. Researchers are interested if the distribution of values for the change in HB
(Hemoglobin) follows the pattern where 1/3 of the time the decrease is less than or
equal to 1 (HB2-1), 1/3 of the time the decrease is between 1 and 2 (-2 <HB <-1), and 1/3
the time the decrease is greater than or equal to 2 (HB <-2). From our sample what can
you conclude?
a. State the Null Hypothesis
b. Which test statistic would you use and what is the observed value?
c. What conclusion would you reach (justify)?
2. Is obesity associated with a RER greater than 1.1?
a. State the Null Hypothesis
b. Which test statistic would you use and what is the observed value
c. What conclusion would you reach (justify)?
Transcribed Image Text:Anernia (low healthy blood cells or hemoglobin) has an important role in exercise performance.
However, the direct link between rapid changes of hemoglobin and exercise performance is
still unknown. A study investigated 18 patients with a blood disorder (beta-thalassemia).
Participants in the study performed an exercise test before and the day after receiving a blood
transfusion. Data are given in the table.
HB = Hemoglobin
RER = Respiratory exchange
ratio
ID
Change in
HB
Obese
RER > 1.1
-1.4
-1.5
-2
1
No
No
2
No
No
No
Yes
No
Yes
No
Yes
4
-2.1
No
-1.9
-1.6
-1.8
-0.8
Yes
6.
Yes
No
No
8.
Yes
9.
-1
No
No
Yes
10
-1.2
-0.8
No
11
No
No
12
-1.5
Yes
No
No
No
No
No
13
-1.4
Yes
14
15
2.6
Yes
Yes
16
17
18
-1.7
-2.6
2.7
Yes
No
Yes
Yes
-1.5
No
2222322222222233
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