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Category > Economics Posted 09 May 2017 My Price 10.00

One factor in the development of tennis elbow

 

3.39 ▼ One factor in the development of tennis elbow, a malady that strikes fear into the hearts of all serious play- ers of that sport (including one of the authors), is the impact-induced vibration of the racket-and-arm system at ball contact. It is well known that the likelihood of getting tennis elbow depends on various properties of the racket used. Consider the accompanying scatterplot of x = racket resonance frequency (in hertz) and y = sum of peak-to- peak accelerations (a characteristic of arm vibration, in meters per second per second) for n = 23 different rackets (“Transfer of Tennis Racket Vibrations into the Human Forearm,” Medicine and Science in Sports and Exercise [1992]: 1134–1140). Discuss interesting features of the data and of the scatterplot.

 

y

 

38

36

34

32

30

28

26

24


22                                                                                     x

 

Engine

Age

Baseline

Reformulated

100    110   120   130    140    150   160   170   180    190

1

0

1.72

1.88

 

2

0

4.38

5.93

 

3

2

4.06

5.54

 

4

11

1.26

2.67

 

5

7

5.31

6.53

 

6

16

0.57

0.74

 

7

9

3.37

4.94

 

8

0

3.44

4.89

 

9

12

0.74

0.69

 

10

4

1.24

1.42

 

 

 

 

 

 

 

Q118

3.40  ● Stress can affect the physiology and behavior of

animals, just as it can with humans (as many of us know

all too well). The accompanying data on x = plasma corti-

sol concentration (in milligrams of cortisol per milliliter of

plasma) and y = oxygen consumption rate (in milligrams

per kilogram per hour) for juvenile steelhead after three

2-min disturbances were read from a graph in the paper

“Metabolic Cost of Acute Physical Stress in Juvenile Steel-

head” (Transactions of the American Fisheries Society

[1987]: 257–263). The paper also included data for un-

stressed fish.

 

x

25      36      48     59      62      72      80   100   100   137

asked whether or not it was a good time or a bad time to

y

155   184   180   220   280   163   230   222   241  350

buy a house.

a.    Is the value of y determined solely by the value of x? Explain your reasoning.

b.    Construct a scatterplot of the data.

c.    Does an increase in plasma cortisol concentration ap- pear to be accompanied by a change in oxygen consump- tion rate? Comment.

 

 

 

 

 
 

Answers

Alpha Geek
(8)
Status NEW Posted 09 May 2017 01:05 PM My Price 10.00

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Attachments

file 1494335952-Answer.docx preview (368 words )
3-----------.39----------- ----------- -----------One----------- fa-----------cto-----------r i-----------n t-----------he -----------dev-----------elo-----------pme-----------nt -----------of -----------ten-----------nis----------- el-----------bow-----------, a----------- ma-----------lad-----------y t-----------hat----------- st-----------rik-----------es -----------fea-----------r i-----------nto----------- th-----------e h-----------ear-----------ts -----------of -----------all----------- se-----------rio-----------us -----------pla-----------y- -----------ers----------- of----------- th-----------at -----------spo-----------rt -----------(in-----------clu-----------din-----------g o-----------ne -----------of -----------the----------- au-----------tho-----------rs)-----------, i-----------s t-----------he -----------imp-----------act------------in-----------duc-----------ed -----------vib-----------rat-----------ion----------- of----------- th-----------e r-----------ack-----------et------------and------------ar-----------m s-----------yst-----------em -----------at -----------bal-----------l c-----------ont-----------act-----------. I-----------t i-----------s w-----------ell----------- kn-----------own----------- th-----------at -----------the----------- li-----------kel-----------iho-----------od -----------of -----------get-----------tin-----------g t-----------enn-----------is -----------elb-----------ow -----------dep-----------end-----------s o-----------n v-----------ari-----------ous----------- pr-----------ope-----------rti-----------es -----------of -----------the----------- ra-----------cke-----------t u-----------sed-----------. C-----------ons-----------ide-----------r t-----------he -----------acc-----------omp-----------any-----------ing----------- sc-----------att-----------erp-----------lot----------- of----------- x----------- =----------- ra-----------cke-----------t r-----------eso-----------nan-----------ce -----------fre-----------que-----------ncy-----------
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