Nine year olds are taller than seven year olds. This is an example of a reference drawn from (A) Vertical study (B) Cross-sectional study (C) Time series study (D) Experimental study

Nine year olds are taller than seven year olds. This is an example of a reference drawn from (A) Vertical study (B) Cross-sectional study (C) Time series study (D) Experimental study
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(B) Cross-sectional study
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The process not needed in experimental research is: (A) Observation (B) Manipulation and replication (C) Controlling (D) Reference collection

Description : The process not needed in experimental research is: (A) Observation (B) Manipulation and replication (C) Controlling (D) Reference collection

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Description : Generally speaking the best research approach for casual research is 1. observation 2. survey 3. cross sectional 4. experimental 5. none of these

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Last Answer : (D) all of the above

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The world population growth rate at a certain reference year was 3.5%. Assuming exponential growth of population, after how many years, the population of the world would have increased by a factor 16 ? (A) ~ 80 years (B) ~ 40 years (C) ~ 160 years (D) ~ 320 years

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Last Answer : Answer: B

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