a) The administration of a secondary school wants to collect student opinions on

Question

a) The administration of a secondary school wants to collect student opinions on a proposed new timetable. They decide to interview a simple random sample of 30 students in grade 8, a simple random sample of 50 students in grade 9, a simple random sample of 30 students in grade 10, and a simple random sample of 30 students in grade 11.

b) A city is interested in collecting opinions about its transit service from both users and non-users. It hires a pollster who divides the city into blocks. The pollster then conducts a survey of the person answering at the second house to the west of the northeast corner of each block. If the house is divided into apartments, the first apartment on the ground floor is surveyed. The selected location of the house or apartment on each block is randomly chosen.

c) In order to determine the percentage of firecrackers that are duds, the manufacturer fires off every 1000th firecracker produced.
the following which is
Systematic Random Sampling
Stratified Random Sampling
Multistage Random Sampling
Cluster Random Sampling
Simple Random Sampling
Destructive Sampling
Destructive Stratified Sampling.

each question contains one answer,

Explanation / Answer

a)

Here each grade is strata and then we choose a simple random sample from each grade so it is startified sampling.

Correct opton:

b. stratified random sampling

b)

Sample is taken at each location at a particular interval so it is systematic random sampling.

Correct opton:

b:Systematic Random Sampling

c)

Correct opton:

d.Destructive Stratified Sampling

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