They are more likely to contract HIV
1: Use a smaller weight and see how many reps you can get. Each time you test yourself, use the same weight. You should progressively be able to complete more reps as you get stronger. It is easy to replicate and will show comprehensible results. This type of test pairs well with bodyweight exercises like pushups.
2: Push yourself to lift heavier weights. As you grow stronger, you will be able to lift more. This can be dangerous without a spotting partner, but can also be very beneficial if done correctly.
Answer:
a. internal
Explanation:
This experiment results show that the drug effect on patients was effective improving their immune functioning so external validation would be sufficient for this study.
Statistical information shows that the difference between the treatment group and the control group wasn't significant but still shows the improvement on immune system and effectiveness in Jeremy's test.
The drug improved the participants immune functioning as it claimed it would so costruct validation would be sufficient.
We cannot be sure that the drug stablishes a trustworthy cause and effect relation between treatment and outcome on patients and alternative explanations can be found since there was an improvement on the control group immune system as well.
Internal validation requires a trustworthy cause and effect relationship between treatment and outcome stablished by the experiment so it isn't sufficient for this study.