Question

In: Statistics and Probability

The data shown are cigarette taxes per pack in cents imposed by each state (and DC...

The data shown are cigarette taxes per pack in cents imposed by each state (and DC and US territories) as of December 2018.  

68

200

200

115

287

84

435

210

450

134

37

320

57

198

100

136

129

110

108

200

200

351

200

304

68

17

170

64

180

178

270

166

435

45

44

160

203

133

260

57

153

62

141

170

308

30

303

120

252

60

509

400

375

425

Source: https://www.tobaccofreekids.org/assets/factsheets/0097.pdf

9.         Construct a frequency distribution using six classes.

10.       There are several different ways to picture data.  What way do you think would be the most effective for these data? Explain the reason for your answer.

11.       What will the MEAN of the data tell us?  What is the mean of these data?

12.       What will the MODE of the data tell us?  What is the mode of these data?

13.       What will the Median of the data tell us?  What is the median of these data?  

14.       Explain which of the measures you found above is the most meaningful for this data set?  

15.       Which of these taxes fall in the 90th– 99thpercentiles?

Solutions

Expert Solution

9) The given data is 68,200,200,115,287,84,435,210,450,134,37,320,57,198,100,136,129,110,108,200,200,351,200,304,68,17,170,64,180,178,270,166,435,45,44,160,203,133,260,57,153,62,141,170,308,30,303,120,252,60,509,400,375,425

Arrange the given data into a frequency table by taking 6 classes with width of 83

Class frequency(f) midpoint(x) f. X cf

17-100 14 58.5 819 14

100-183 16 141.5 2264 30

183-266 10 224.5 2245 40

266-349 6 307.5 1845 46

349-432 4 390.5 1562 50

432-515 4 473.5 1894 54

11) mean =sum(fx) /N

where N=54

Mean= 10629/54

Mean= 196.8333

Mean showing that it is extremely effected it is so far to some observations. So it may not be best measure for given data

12) mode= L + ( f-f1/2f-f1-f2 ) C

L= lower limit of mode clss

f = frequency of mode clss

f1=previous clss frequency of mode class

f2=after class frequency of mode class

Mode = 100+(16-14) 100/32-14-10

Mode = 120.75

13) median =L +( N/2 -cf / F) 100

Median = 100 + ( 27-14/16) 100

Median = 167.4375

Finally we conclude that arithmetic mean is best measure for given data because mean >median >mode


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