Question

Elmo likes music. He wondered if listening to music while studying will improve scores on an exam. Fifty students who were to take the midterm in a week agreed to be part of a study. Half were randomly assigned to listen to classical music while studying for the exam. The other half were told not to listen to any music while studying for the exam. A hypothesis test is to be performed to determine if the average scores of those listening to music while studying for the exam were higher than those who did not listen to any music while studying for the exam. Which of the following hypothesis tests should be​ used?
A. a​ two-sample z-test.
B. a​ chi-square test.
C. a​ two-sample t-test.
D. a​ one-sample t-test.
E. a​ two-sample z-test for proportions.

Answer 1

I think the answer might b a

Answer 2

The hypothesis tests should be​ used is A. a​ two-sample z-test.

What is Alternative Hypothesis ?

An Alternative Hypothesis is the one that disproves the Null Hypothesis in that it believes that indeed there is a change in the dependent variable due to a change in the independent variable.

The Alternative Hypothesis is essentially aims to prove the assertion of the Researcher that there is an effect as a result of the introduction of a variable.

Null Hypothesis believes that no significant difference exists between a change in a dependant Variable as a result of a change in an independent one.

This is the alternative hypothesis because it believes that there was a change in the exam results due to reading while studying.

Therefore, the hypothesis tests should be​ used is A. a​ two-sample z-test.

Learn more about the hypothesis test;

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