Question

question #9
a study of college athletes show that their resting heart rate is 67 beats per minute. according to a study done recently, the average resting heart rate for all adults is 73 beats per minute. it was also discovered that there is a 1/10 chance that these results were due to random chance. are these results statistically significant?
o no, because the results are unlikely to occur by random chance.
o no, because the results are likely to occur by random chance.
o yes, because the results are unlikely to occur by random chance.
o yes, because the results are likely to occur by random chance.

question #10
true or false: an example of a matched pair experimental design is having one twin receive treatment a and the second twin receive treatment b.
o false o true

Explanation:

Question #9

In statistics, a result is considered statistically significant if the probability (p - value) of it occurring by random chance is low. A common threshold is \(p<0.05\) (or \(5\%\) chance). Here, the chance of results due to random chance is \(\frac{1}{10}=0.1 = 10\%\), which is greater than the \(5\%\) threshold. So the results are not statistically significant.

In a matched - pair experimental design, pairs of subjects (or units) that are similar (in this case, twins who are genetically similar) are used. One member of the pair gets one treatment (\(A\)) and the other gets another treatment (\(B\)). This design helps to control for confounding variables related to the similarity of the pair.

Answer:

No, because the results are likely to occur by random chance.

Question #10