What type of sample design is described here? To assess job satisfaction the HR

Question

What type of sample design is described here? To assess job satisfaction the HR department of a large bank chooses four of the bank's branches at random and interviews all employees in each branch. (A) Simple random sample (B) Cluster (C) Systematic (D) Stratified Is the number in bold, a parameter or a statistic? "A survey of 250 Amazon customers found that 43% were Amazon Prime members." (A) Parameter (B) Statistic Identify the type of variable: The number of hits on a popular website during a 4-hour period. (A) Nominal (B) Ordinal (C) Continuous (D) Discrete A study recruited roughly 200 men and women volunteers, measured their blood pressure and classified them into two groups (moderately high, normal). The researchers then subjected the subjects to tests of memory and reaction time. The results showed that those with moderately high blood pressure did worse on tests of memory and reaction time then those with normal blood pressure. The study described above is a (A) Randomized Experiment (B) Observational Study

Explanation / Answer

1:

In a cluster sampling, populaiton is divided into clusters and then some cluster are selected randomly.

After that entire elements of selected clusters are included in the sample.

hence, option B is correct.

2:

Here 43% shows the proprotion in sample so it is statistics.

Correct option is B.

3:

The number of hit is countable so it is discrete random variable.

Correct option is D.

4:

B: Observational Study

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