Hi everybody. I come back. And today, you and I will continue to fix a new exercise. It’s “The Ability To Visually Search, Such As When Reading An X-Ray“. Let’s follow along!

Question: The Ability To Visually Search, Such As When Reading An X-Ray

Here is our question:

The time to complete a visual search task was again recorded for each participant after the assigned game was played. For each game, the mean improvement time (time before minus time after) was calculated.

(b) One researcher expressed an interest in investigating whether playing a driving game would lead to a different mean improvement time to complete a visual search task than would playing a sports game. Assuming the appropriate population values are approximately normally distributed, state the name of a test with the appropriate null and alternative hypotheses that could be used to investigate the researcher’s interest.

(c) When the appropriate test was performed, no significant difference was found in mean improvement time between the driving game and the sports game. Name one change the researchers could make in a future study to increase the power of the test. Explain why such a change would increase the power.

Answer

Here is answer for question a:

thus, we can do it by randomly calling a number say 27 and assigning it to group A and then again calling another number and assign it to B and so on, till each group has 20 participants.

question b:

The test we will use is “t-test” for difference of mean. With assumptions:

The sample has been drawn from the normal for population with mean ux and uy.

The population variance are equal

and here is answer for question c:

Relevant knowledge

Two events (involving the same trial) are independent if and only if the occurrence or non-occurrence of one does not affect the probability of the occurrence of the other (in other words, does not affect the likelihood of the other event occurring).
Two events A and B are said to be independent if the occurrence or non-occurrence of A does not affect the probability of event B occurring.

Conclusion

Thus, we have solved for you the questions “The Ability To Visually Search, Such As When Reading An X-Ray”. If you have any questions, please contact us immediately for answers. Thanks for reading!