Statistics

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PROBABILITY and STATISTICS

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EXERCISE 1.1
Name

Score

Section

Date

A. In each of these statements, tell whether descriptive or inferential statistics have been used.
1. 6 out 45 computers in the computer laboratory are defective.
2. This year, the net income of MAI Company increased by 20%.
3. In 2010, the sales volume of JBC Company will increased by 15%.
4. Seven out of ten on-the-job injuries are men.
5. Gross sales of EGC Fashion were P12.6 million in the month of January 2009.
6. The prices of crude oil may soon reach 20 dollars per barrel.
7. The average number of absences of employees in a company was 14 per year.
8. Expenditures for a cable company for 2008 was P15.5 million.
9. It is expected that interest rates will decrease by the year ends.
10.The median income of people aged 24 – 25 is P20,000 per month.
B. Classify each as nominal level, ordinal level, interval level, or ratio-level measurement.
1. Pages in this textbook
2. Rankings of basketball teams in the PBA.
3. Weights of cargoes being disembarked at the SUBIC Economic Zone.
4. Temperatures at Tagaytay.
5. Salaries of the top CEO of SM.
6. Times required for students to finish a quiz.
7. Marital status of teachers at UST faculty of engineering.
8. Height of students in a class.
9. Number of books at a library
10.Rating of professors in a certain college (poor, satisfactory, very satisfactory.
Excellent)
EXERCISE 1.2
Name

Score

Section

Date

Classify each if the following statements are related to a qualitative, quantitative,
discrete or continuous data by writing the data in the box provided for.

No. Statements

Qualitative

Quantitative Discrete

Continuous

1

2

3

4

5

6

7

8

9

10

11

12

13

14

The normal level of
Magat
Dam is 180 meters
Isabela Jean finished
first in the mural
drawing contest
Joel’s car consumed
10 liters of gasoline
per day
Johann bought 20
cans of 1 liter cooking
oil
About 32,000
applicants took the
UST entrance test
every year
The highest
temperature recorded
in Manila was 36.2°C
There were 400
expensive cars
confiscated by the
Bureau of Customs
There are 10 tall
buildings in Makati
Measuring more than
500 ft.
A cable company
installed 2000 meters
of new line in Manila
A cable company
imported 200 rolls of
cable
Isabela Oil Company
imported 20 barges
of crude oil
JRC Company
exported 2 40 foot
containers of toys to
China
EGC Bake Shop
bought 50 bags of
flour containining 25
kilograms each bag
Esther’s Fashion sold

15

40 meters of silk
fabric
Isabella Jeans sold
500 medium sized
shirts

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