Statistika Bisnis 1

Week 2

Organizing Data

Agenda

Time Activity

13:40 – 13:55 Attendance check

13:55 – 14:10 Review last week material

14:10 – 14:40 Discussion

14:40 – 15:20 Class exercise

Objectives

By the end of this class, students will:

• Understand how to collect data in statistic

• Be able to organize categorical and numerical data

• Understand how to read and interpret an organized data (table)

DISCUSSION

Content

Data Collection

• Categorical Data

• Numerical Data

Organizing Data

• Categorical Data

• Numerical Data

• Two Numerical Data

Visualizing Data

Data Collection

Primary Data

Source

Secondary Data

Source

Organizing Data C

ateg

ori

cal D

ata The Summary Table

The Contingency Table

Nu

mer

ical

Dat

a Stacked and Unstacked data

The Ordered Array

The Frequency Distribution

The Relative Frequency Distribution and the Percentage Distribution

The Cumulative Distribution

The Summary Table Province Frequency Percentage

Jawa Barat 13 46.43%

Sulawesi Selatan 5 17.86%

Jakarta 2 7.14%

Jawa Timur 2 7.14%

Sumatera Utara 1 3.57%

Sumatera Selatan 1 3.57%

Sulawesi Tengah 1 3.57%

Banten 1 3.57%

Bali 1 3.57%

Sumatera Barat 1 3.57%

Total 28 100.00%

The Contingency Table

Jenis Kelamin Saudara Kandung

Total Ada Tidak ada

Laki-laki 6 1 7 Perempuan 18 2 20

Total 24 3 27

Jenis Kelamin Saudara Kandung

Total Ada Tidak ada

Laki-laki 22% 4% 26% Perempuan 67% 7% 74%

Total 89% 11% 100%

Overall Percentage

The Contingency Table

Jenis Kelamin Saudara Kandung

Total Ada Tidak ada

Laki-laki 86% 14% 100% Perempuan 90% 10% 100%

Total 89% 11% 100%

Jenis Kelamin Saudara Kandung

Total Ada Tidak ada

Laki-laki 25% 33% 26% Perempuan 75% 67% 74%

Total 100% 100% 100%

Column Percentage

Row Percentage

The Ordered Array

150 155 155 155 155 156 156 156 156 157

157 160 160 160 160 162 168 168 168 170

170 171 173 173 174 174 175

The Frequency Distribution

Height Frequency

150 but less than 155 1

155 but less than 160 10

160 but less than 165 5

165 but less than 170 3

170 but less than 175 7

175 but less than 180 1

Total 27

The Relative Frequency Distribution and the Percentage Distribution

Height Relative

Frequency Percentage

150 but less than 155 0.04 4%

155 but less than 160 0.37 37%

160 but less than 165 0.19 19%

165 but less than 170 0.11 11%

170 but less than 175 0.26 26%

175 but less than 180 0.04 4%

Total 1 100.00%

The Cumulative Distribution

Height Cumulative Percentage less than

indicated value

150 0

155 4%

160 41%

165 59%

170 70%

175 96%

180 100%

EXCERCISE

2.9

Federal obligations for benefit programs and the national debt were $63.8 trillion in 2008. The cost per household ($) for various categories was as follows:

Category Cost per Household ($)

Civil servant retirement Federal debt Medicare Military retirement Social Security Other

15,851 54,537 284,288 29,694 160,216 2,172

2.9

a. Compute the percentage of values in each category.

b. What conclusions can you reach concerning the benefit programs?

2.10

The following table is based on a survey of 600 college seniors regarding their undergraduate major and whether they plan to go to graduate school.

UNDERGRADUATE MAJOR

Graduate School Business Engineering Total

Yes No

170 182

110 138

280 320

Total 352 248 600

2.10

a. Construct contingency table based on total percentages, row percentages, and column percentages.

b. What conclusions can you draw from these analyses?

2.17

The following data contains the total cost ($) for four tickets, two beers, four soft drinks, four hot dogs, two game programs, two baseball caps, and parking for one vehicle at each of the 30 Major League Baseball parks during the 2009 season. These costs were

164, 326, 224, 180, 205, 162, 141, 170, 411, 187, 185, 165, 151, 166, 114, 158, 305, 145, 161, 170, 210, 222, 146, 259, 220, 135, 215, 172, 223, 216

2.17

a. Organize these costs as an ordered array.

b. Construct a frequency distribution and a percentage distribution for these costs.

c. Around which class grouping, if any, are the costs of attending a baseball game concentrated? Explain.

2.21

The manufacturing company is produces electric insulators. If the insulators break when in use, a short circuit is likely to occur. To test the strength of the insulators, destructive testing in high-powered labs is carried out to determine how much force is required to break the insulators. Force is measured by observing how many pound must be applied to the insulator before in breaks. Force measurements are collected from a sample of 30 insulators and shown here:

2.21

1,870 1,728 1,656 1,610 1,634 1,784 1,522 1,696

1,592 1,662 1,866 1,764 1,734 1,662 1,734 1,774

1,550 1,756 1,866 1,866 1,820 1,744 1,788 1,688

1,810 1,752 1,680 1,810 1,652 1,736

a. Construct a frequency distribution and a percentage distribution.

b. Construct a cumulative percentage distribution. c. What can you conclude about the strength of the

insulators if the company requires a force measurement of at least 1,500 pounds before the insulator breaks

THANK YOU