Before we start our analysis we need to understand our population and the sampling methods used.
The Sunnyville sample was obtained by stratified random sampling with the strata based proportionally on age groups. This type of sampling may be necessary for investigating the average reaction time.
Which of the statement(s) below is/are true regarding stratified random sampling for the research question?

(Pick 1 or more correct answers)

Question

Before we start our analysis we need to understand our population and the sampling methods used. 
 The Sunnyville sample was obtained by stratified random sampling with the strata based proportionally on age groups. This type of sampling may be necessary for investigating the average reaction time. 
 Which of the statement(s) below is/are true regarding stratified random sampling for the research question?
   
 (Pick 1 or more correct answers)

Answer

A sampling frame of the entire population, along with their age and the proportions of each age sub-group in the population is needed to achieve this stratified sampling.

Answer

Stratified sampling allows for sequential order within the sample which ensures that the attribute studied is random.

Answer

Age is not relevant to the condition investigated and therefore will have no effect on reaction time or cognition

Answer

A sampling frame which divides the population into a set of different coherent areas and randomly selects areas to assess.

Answer

Stratified sampling allows for the sampling to be random within each sub-group being investigated (in this case, each age group) – so the proportions of the different age groups are the same in the population and the sample.

Answer

Age is often referred to as “the universal confounder” – so reaction time might be effected by age.

Crowdly

Before we start our analysis we need to understand our population and the sampli...

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