Yasir wants to determine if there is a relationship between room color and sleep. Based on his research, Yasir makes an educated

Answer:

Variables to be tested by an experiment Research on the topic to see what others have learned

Explanation:

Since Yasir aims to determine the relationship between room color and sleep, he hypothesizes that people drift into slumber quicker in blue rooms than in yellow ones. He gathers opinions from various individuals regarding their favorite color—yellow or blue—and uses these insights to ascertain whether his hypothesis holds true.

The flaw in his approach is that he didn't validate the facts but relied on subjective preferences.

Enjoying a certain color is distinct from influencing sleep patterns.

Thus, he ought to have tracked the paint color and the amount of sleep experienced by a adequately sized sample to test his hypothesis.

Variables to be tested by an experiment and researching existing literature is the accurate answer.

Yasir wished to explore how sleep relates to room color. He conducted necessary preliminary research and formed a hypothesis suggesting individuals doze off faster in blue-painted rooms compared to those painted in yellow. Yasir surveyed several individuals about their color preference—yellow or blue—and utilized their feedback to assess the validity of his hypothesis. However, he did not conduct an actual experiment to examine the impact of room color on sleep, and he failed to clearly define the variables that should have been part of his experiment.

Hence, the correct answer would be,

An experiment that directly tests the hypothesis

Variables to be tested by an experiment