1. STATISTICS AND PROBABILITY 2ND SEMESTER 2017-2018
REVIEW
STATISTICS AND PROBABILITY
2ND SEMESTER

2. Directions: In each of the statements, tell whether descriptive or inferential statistics have been used.
The average salary of 500 private high school teachers in 2017 was P22,400.
2. Nine out of ten on-the-job fatalities are men.
3. Expenditures in the cable industry were Php 5.66 billion in 2005.
4. The median Household income for people aged is Php
5. Based on a random sample, it was concluded that the average cost of a hotel room in Manila was greater than one in QC.
6. Drinking decaffeinated coffee can raise cholesterol levels by 7%.
7. The national average annual medicine expenditure per person
is Php
8. Experts say that mortgage rates may soon hit bottom.
9. The average Filipino viewer watches 151 hours of TV per month.
10. The average Amazon.com rating of the book The Complete Idiot’s Guide
to Statistics by 26 reviewers is 4.6 on a scale of 1 to 5.
Descriptive
Descriptive
Descriptive
Descriptive
Inferential
Inferential
Descriptive
Inferential
Descriptive
Descriptive

3. Directions: Determine whether the underlined value is a parameter or a statistic.
1. In a national survey on substance abuse, 10% of respondents aged 12 to 17 reported using illicit drugs within the past month.
2. Ty Cobb is one of major league baseball’s greatest hitters of all time, with a career batting average of
3. A study of 6000 adults in public rest rooms found that 23% did not wash their hands before exiting.
4. Interview of 100 adults 18 years of age or older, conducted nationwide, found that 44% could state the minimum age required for the office of US president.
5. 98% of all the students surveyed planned to go to college right after high school.
Statistic
Parameter
Statistic
Statistic
Parameter

4. Directions: For each of the following variables, determine whether the variable is qualitative or quantitative.
Name of Internet service provider.
Time in hours spent surfing the Internet per week.
Number of text messages sent in a week.
Number of online purchases made in a month.
Whether the individual has a Facebook account.
Number of bicycles sold in 1 year by a large sporting goods store.
Colors of baseball caps in a store.
Times it takes to cut down a lawn.
Capacity in cubic feet of UST-AC swimming pool.
10. Marital status of faculty members in a university.
Qualitative
Quantitative
Quantitative
Quantitative
Qualitative
Quantitative
Qualitative
Quantitative
Quantitative
Qualitative

5. Directions: Classify each variable as discrete or continuous.
Number of doughnuts sold each day by Doughnut Heaven.
2. Water temperature of six swimming pools on a given day.
3. Weights of dogs in a pet shelter.
4. Lifetime (in hours) of 12 power banks.
5. Number of cheeseburgers sold each day by a hamburger stand on a college campus.
6. Number of movies stored in your hard drives.
7. Capacity (in gallons) of six reservoirs.
8. The number of words in a book.
9. The heights of your classmates.
10. The number of books on your shelves.
Discrete
Continuous
Continuous
Continuous
Discrete
Discrete
Continuous
Discrete
Continuous
Discrete