A Researcher Wants to Find Out If the Best Sprinters

question 24

Multiple Choice

A researcher wants to find out if the best sprinters of the planet improve the racing time at world championships in the 100 meters running discipline among men. He considers the results of the final racings of the last three world championships and compares the average time in each final racing. These data are represented in the table below ("https://www.iaaf.org/results/iaaf-world-championships-in-athletics") . ​ ​
Chose the correct null and alternative hypotheses statements.

• A)The null hypothesis is , and the alternative is : at least two of p's are different.
• B)The null hypothesis is , and the alternative is : all μ are equal.
• C)The null hypothesis is , and the alternative is : all p are equal.
• D)The null hypothesis is , and the alternative is : at least two of μ's are different.

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Definitions:

Demographics

Statistical data relating to the population and particular groups within it, often used for marketing, policy-making, and research purposes.

Demographics

Information about the characteristics of a population, such as age, sex, income level, and education, which is used for research and marketing purposes.

Quantifiable Characteristic

An attribute or feature that can be measured or evaluated using numbers or metrics.

Education

The process of facilitating learning, or the acquisition of knowledge, skills, values, beliefs, and habits through various methods like teaching, training, and research.