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A Researcher Wants to Find Out If the Best Sprinters

Question 10

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") . ​ 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. ​
Chose the correct null and alternative hypotheses statements.


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

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