In the Netherlands, all men take a military pre-induction exam at age 18
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In the Netherlands, all men take a military pre-induction exam at age 18

3. In the Netherlands, all men take a military pre-induction exam at age 18. The exam includes an intelligence test known as “Raven’s progressive matrices” and includes questions about demographic variables like family size. A study was done in 1968, relating the test scores of 18-year old men to the number of their brothers and sisters. The records of all the exams taken in 1968 were used.

a. What is the population?

b. What is the sample?

c. Is there any sampling error? Justify your answer.

Hint
StatisticsRaven's Progressive Matrices Test is a behavioral task that measures fluid intelligence by testing people's non-verbal, analytical abilities. Raven's Progressive Matrices (often referred to simply as Raven's Matrices) or RPM is a non-verbal test typically used to measure general human intelligence and abstract reasoning and is regarded as a non-verbal estimate of fluid intelligence....

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