Intro to Hypothesis Testing

What is the main purpose of confidence intervals in statistics?

• Give a definitive yes/no answer

• Predict future outcomes

• Calculate exact values

• Provide an estimation of parameter locations

Which statement best describes a hypothesis?

• An untestable opinion

• An idea that can be tested

• A proven fact

• A random guess

What is the purpose of the null hypothesis in hypothesis testing?

• To predict future outcomes

• To be tested against the alternative hypothesis

• To prove the alternative hypothesis

• To confirm the sample statistic

In a hypothesis test, what does the alternative hypothesis represent?

• The sample statistic

• The status quo

• The proven fact

• Everything other than the null hypothesis

Why is the researcher generally trying to reject the null hypothesis?

• To avoid making decisions

• To predict future outcomes

• To confirm the null hypothesis

• To challenge the status quo

Which is an example of a null hypothesis?

• There is a significant difference in test scores between students who study with music and students who study in silence.
• There is no difference in test scores between students who study with music and students who study in silence.
• Students who study with music perform better than students who study in silence.
• The study method has no impact on test scores.

Which is an example of an alternative hypothesis?

• Students who study with flashcards perform worse than students who study with textbooks.
• Students who study with textbooks perform worse than students who study with flashcards.
• There is a significant difference in test scores between students who study with flashcards and students who study with textbooks.
• There is no difference in test scores between students who study with flashcards and students who study with textbooks.

What is the correct way to write the null hypothesis that states that :

The average age of Grade 11 students in the Philippines is 17 years old.

What is the alternative hypothesis for the claim that the average IQ of the general population is 100?

Match the following

Groups:

(a) Null hypothesis

,

(b) Alternative hypothesis

,

(c) Hypothesis

,

(d) Hypothesis testing

• a statistical tool that uses sample data to evaluate a hypothesis about a population

• always features an equal sign

• must never include an equal sign

• an idea or explanation for something that is based on known facts but has not yet been proved

• a systematic procedure for deciding whether the results of a research study support a theory

• a prediction that can be tested through research and experiments

• a statement that opposes the null hypothesis

• states the status quo