4e3408229 651 5e7341 93b2fdd5b1 e040563/Downloads/MA209981 %20Chapter2.pdf icros
ID: 3042705 • Letter: 4
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4e3408229 651 5e7341 93b2fdd5b1 e040563/Downloads/MA209981 %20Chapter2.pdf icrosoft Word 7,&, eed 9 For the data on page 15, which is 84 52 93 61 74 79 65 88 63 57 64 67 72 74 55 82 61 68 47 795061 65584571 63 54 95 61 75 52 68 66 73 80%"657957 716467 8683724678506] 7856 725364 6982679271 82 we would thus get the deeble-stem play S | 2 be113 6378 9 tohold|heieues leaves 5,6,7.& and 1,2 3, 4 and "este second me pontin io hold the 9-13 where we doubled the number of siem positions by curting io bal the interval anered by cach sens digk Constact a double-stem display Sor the data o Esereise 2.7 2.3 FREQUENCY DISTRISUTIONS I Followieg are the anbers of minuses that it sook a newspaper delivery service to The previous section coims our experience that ustreated raw data is difficult to deal with. The dot diagram and the siem-and-leaf duplay were introduced as techniques to oeganize numbers and make them more compeehensible. In this soction we discuss the more traditional to classily, or group, deta deliver the morning newspapers on 28 days 78 66 54 62 67 6 62 60 71 67 80 60 56 61 636552 596573686460 71 57%76 Consider the problem of a social scientist who wants to eumine the ages of death-row inmates, that persoas awating crorston, the United States. He will bkely arn to the Saasistical Absonaer of she United Sunes, which is a reliable source for information of thie hature Construct a double stem display for these valoes 2 Accunding to the Federal Bureau of Invesrigation, the namaber of motor vehie thefts in the midwesten states during a recent yea, per 10,000 ofl population, was Thefa per 10.000 of popalenon A good overal understandeg of a large set of data can ofhen be created by groupng the data =to . mmber of class intervals or catepoen) and ou. social scientast ads thay the desired information is presented as follows for the year i999, from the 2001 edition of the Sadical Abamuct of he Ued Ste 10,000 Siate Missoun North Dakora Souil Dakot 43 Persons ander encr of e-9 16 35 12 Kansas 23 34 year 25-34 years 5 54 yeen Mnesoda 28 Cats,nact , stern and leaf dnplay wah strm labels i, 2.3,4,and 5. 522 The sumber of patiens who received treatment at a ospital eergency soomn each of 30 coesecutive days was 3 distribation. It shows how the ages of 3527 death-row imates ace disbuted 5 7 46 33 31 29 43 31 46 43 49 36 38 041 39 40 28 14 0 56 44 38 37 5 44 36 475 The data are grouped acconding to the numeris valoe, age In some omatces we roup information according to ponsumeric aiens, soch as culor, geograg 7:43Explanation / Answer
I can use R to construct stem plot
2.13
x=c(35,37,46,33,31,29,43,31,31,46, 43,49,36,38,40,41,
29,40,28,34,30,56,44,38,37,51,44,36,47,50)
library(aplpack)
stem.leaf(x)
1 | 2: represents 12
leaf unit: 1
n: 30
3 2. | 899
7 3* | 0111
8 t | 3
10 f | 45
14 s | 6677
(2) 3. | 88
14 4* | 001
11 t | 33
9 f | 44
7 s | 667
4 4. | 9
3 5* | 01
t |
f |
1 s | 6
2.14
(a)
y=c(47,89,79,50,61,95,65,58,45,71,63,54,99,61,75,52,
68,65,79,73,80,54,71,65,70,57,88,71,64,67,86,83,72,46,
78,50,61,69,78,56,72,53,64,93,69,82,67,92,71,82)
stem(y)
The decimal point is 1 digit(s) to the right of the |
4 | 567
5 | 002344678
6 | 11134455577899
7 | 0111122358899
8 | 0223689
9 | 2359
(b)
stem.leaf.backback(y,y)
_____________________________________
1 | 2: represents 12, leaf unit: 1
y y
_____________________________________
| 4* |
3 765| 4. |567 3
9 443200| 5* |002344 9
12 876| 5. |678 12
18 443111| 6* |111344 18
(8) 99877555| 6. |55577899 (8)
24 32211110| 7* |01111223 24
16 99885| 7. |58899 16
11 3220| 8* |0223 11
7 986| 8. |689 7
4 32| 9* |23 4
2 95| 9. |59 2
| 10* |
_____________________________________
n: 50 50
_____________________________________
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