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Question 1:

Which of the following is an example of a null hypothesis?

A) There is a relationship between smoking and lung cancer.
B) There is no relationship between exercise and weight loss.
C) There is a relationship between sleep duration and productivity.
D) There is no relationship between stress and heart disease.

Show Answer

Explanation: The correct answer is B) There is no relationship between exercise and weight loss. A null hypothesis is a statement that suggests there is no significant relationship or effect between two variables. In this case, the null hypothesis would state that there is no relationship between exercise and weight loss, and any observed relationship is due to chance or other factors.

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Question 2:

Which of the following is an example of an alternative hypothesis?

A) There is no relationship between caffeine consumption and sleep quality.
B) There is a relationship between exercise and physical fitness.
C) There is no relationship between diet and cholesterol levels.
D) There is a relationship between studying and academic success.

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Explanation: The correct answer is B) There is a relationship between exercise and physical fitness. An alternative hypothesis, also known as the research hypothesis, is a statement that suggests a significant relationship or effect between two variables. In this case, the alternative hypothesis would state that there is a relationship between exercise and physical fitness, indicating that exercise has a positive impact on fitness levels.

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Question 3:

Which of the following is a null hypothesis?

A) The use of a new fertilizer increases crop yield.
B) The use of a new medication reduces symptoms of depression.
C) The use of a new teaching method improves student performance.
D) The use of a new software increases productivity.

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Explanation: The correct answer is A) The use of a new fertilizer increases crop yield. A null hypothesis is a statement that suggests there is no significant relationship or effect between two variables. In this case, the null hypothesis would state that the use of a new fertilizer does not increase crop yield, and any observed increase in yield is due to chance or other factors.

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Question 4:

Which of the following is an alternative hypothesis?

A) There is no relationship between exposure to sunlight and vitamin D levels.
B) There is a relationship between sleep duration and cognitive performance.
C) There is no relationship between exercise and cardiovascular health.
D) There is a relationship between diet and weight gain.

Show Answer

Explanation: The correct answer is B) There is a relationship between sleep duration and cognitive performance. An alternative hypothesis is a statement that suggests a significant relationship or effect between two variables. In this case, the alternative hypothesis would state that there is a relationship between sleep duration and cognitive performance, indicating that sleep duration has an impact on cognitive abilities.

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Question 5:

Which of the following is a null hypothesis?

A) There is a relationship between exercise and weight loss.
B) There is no relationship between caffeine consumption and heart rate.
C) There is a relationship between stress and job performance.
D) There is no relationship between diet and cholesterol levels.

Show Answer

Explanation: The correct answer is D) There is no relationship between diet and cholesterol levels. A null hypothesis is a statement that suggests there is no significant relationship or effect between two variables. In this case, the null hypothesis would state that there is no relationship between diet and cholesterol levels, and any observed relationship is due to chance or other factors.