Find the Value of a Normal Random Variable

question 40

Multiple Choice

Find the Value of a Normal Random Variable
-A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 440 seconds and a standard deviation of 60 seconds. Between what times do we expect most (approximately 95%) of the boys to run the mile

• A) between 322.4 and 557.6 sec
• B) between 341.3 and 538.736 sec
• C) between 345 and 535 sec
• D) between 0 and 538.736 sec

---

Definitions:

Flynn Effect

The observed rise over time in standardized intelligence test scores, named after James R. Flynn.

Flynn Effect

The observed rise in average IQ scores over successive generations, attributed to environmental factors such as improved education and nutrition.

Industrialized Countries

Nations that have highly developed industries and infrastructure, often characterized by higher standards of living, technology use, and economic output.

Statistical Artefact

An apparent result or trend in data that does not accurately reflect the true situation, often due to methodological errors or biases.