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:

Authorization

Official permission or power granted to an individual or entity to carry out certain actions.

Liability

Refers to the state of being legally responsible for something, particularly in terms of debts or financial obligations.

Default Imposed

A consequence or penalty set forth due to non-compliance with established rules or failure to meet certain expectations.

Buyout Price

The amount payable to a partner on his or her dissociation from a partnership, based on the amount distributable to that partner if the firm were wound up on that date, and offset by any damages for wrongful dissociation.