A stratified random sampling technique is one in which:

• you divide a population into groups, such as districts or schools, and then randomly select some of these as your sample

• each member of the population has an equal chance of getting selected.

• from a random starting point, every nth unit from the sampling frame is selected

• the samples are selected based on a specific characteristic of the population. The researcher must select proportional amounts for each characteristic.

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CCSS.HSS.IC.B.3

Which among the following is the benefit of using simple random sampling?

• The results are always representative.

• A lot of issues associated with survey bias are eliminated

• Informants can refuse to participate.

• Interviewers can choose respondents freely.

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CCSS.HSS.IC.B.3

Which of the following would usually require the smallest sample size because of its efficiency?

• simple random sampling

• systematic random sampling

• stratified random sampling

• cluster random sampling

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CCSS.HSS.IC.B.3

Which of the following displays allows you to find the favorite cafeteria lunch item of the sixth-grade students?

• bar graph

• line graph

• histogram

• cumulative frequency graph

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CCSS.6.SP.B.4

Which abbreviated month (in small letters) did year 2018 begin dominating year 2017?

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CCSS.5.G.A.2

Consider the diagram. Which exercise will take the longest time to burn off 5,000 calories?

• In-line skating

• Running

• Swimming

• Bicycling

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CCSS.6.RP.A.3B

Assuming that the burning calorie rate is constant, How long would it take (in hours) for someone to burn 20,000 calories if she swims?

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CCSS.HSF-LE.A.1B

The graph shows the percentage distribution of grades on an exam. Assuming that 1000 people took the test, how many received grades of A or B?

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CCSS.7.SP.A.2

In the given diagram, how many students' birthday fall within the last 4 months of the year?

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CCSS.3.MD.B.3

The bar graph below shows the Week-to-week COVID-19 cases for NCR Group B posted last May 22, 2020, in the UP Website.

Which city has the most COVID cases recorded two weeks ago? 

• Caloocan

• Las Piñas

• Pasay

• San Juan

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CCSS.2.MD.D.10