Classify the following statements as to whether they belong to the area of descriptive statistics or inferential statistics ___________________ 1. At most 5% of SLU students are smokers....

1. Classify the following statements as to whether they belong to the area of   descriptive statistics or inferential statistics

___________________ 1. At most 5% of SLU students are smokers.

___________________ 2. Assuming that less than 20% of the Kalinga coffee beans were  destroyed by a typhoon these past months, we should expect an

increase of no more than P30 for a kilogram of coffee by the end

of the year.

___________________ 3. An employee generalized that the average monthly salary of a  regular employee in a certain company is P12,000.

___________________ 4. A study found out that all customers who have received a gift  certificate from a store 75% went back to the store to shop.

___________________ 5. The average grade in statistics of 50 students is 83.60.

1. At what level are the following variables measured?

_______________ 1. Students rated as superior, above average, average, below  average, or poor

_______________ 2. The scores of students in a statistics quiz

_______________ 3. The main source of income

_______________ 4. The birth order of children in the family

_______________ 5. Age of students availing a discount

_______________ 6. Weights of a sample of bags of raw materials for the  production of a certain product, measured in grams.

_______________ 7. The natural eye color of a sample of 100 children. _______________ 8. The economic status of a sample of families in a certain area. _______________ 9. The final grade of graduate students taking up Statistics. _______________ 10. The school in which a graduate student is enrolled in.

1. Classify the following variables as quantitative or qualitative variables. If the  variable is quantitative, identify whether it is discrete or continuous.

_______________ _______________ 1. The type of payment used by customers _______________ _______________ 2. The evaluation rating of instructors

_______________ _______________ 3. The classification of employees in a  company

_______________ _______________ 4. The weekly allowance of students

_______________ _______________ 5. The length of telephone calls made by  students to their parents

1. In each of the following situations, identify the population, each variable, and  determine if the variable is qualitative or quantitative.


2. A quality control worker with Sweet-Tooth Candy weighs every 100th candy  bar to make sure it is very close to the published weight.


3. John decides to group his employees according to the type of skill  possessed.


4. A researcher is studying the effect of a newly formulated method in glue  laminating wood. She performs an experiment where she compares the  shear stress of the “gluelam” wood using the new method and  commercially available “gluelam” wood. She used 10 items for each  method (new and commercial).


5. To assign workers to two stores, the owner has the workers count off by two to  divide them into teams. Is this (team) a qualitative or quantitative variable?


6. A school is studying its students’ test scores by grade. Explain how the  characteristic ‘grade’ could be considered either a categorical or a numerical  variable?


7. Which of the following situations will result in probability or non-probability  sampling?


8. Population: All residents of a big city

Sampling technique: For one week, researchers stop every fourth  person who passes by a busy downtown street corner.

1. Population: All students in a large high school

Sampling technique: selecting the first 50 students reporting to  school on a Wednesday morning.

1. Population: All the 72 guests at a birthday party.

Sampling technique: The name of each person is written on a slip  of paper then all are placed in a box, mixed, then drawn one  after the other for the available ten door prizes.

1. Population: Business owners with less than 15 employees

Sampling technique: Get information from the DTI (business  permits section), then select a sample size of about 30% from  each of the included 12 barangays

1. In each of the following situations, a random sample must be obtained. Determine  whether a cluster, stratified, or systematic random sampling would be  appropriate. Explain in detail how the sampling is to be conducted. Do not discuss  expected results or conclusions.