A new over-the-counter cold medication includes a warning la…

A new over-the-counter cold medication includes a warning label stating that it “may cause drowsiness” and therefore, it may affect people’s reaction time, which is known to be µ = 206 milliseconds. To evaluate this effect, you obtained a sample of n = 9 people and gave them the new cold medication. One hour later, you measured the reaction time for each individual. The average reaction time for the sample is M = 200  milliseconds with SS = 648. Using a one-tailed test, what decision should be made?

Do college students preform worse in online courses? To answ…

Do college students preform worse in online courses? To answer this question, a researcher compared the test scores of students enrolled in online vs. in person class. Their scores are presented in a table below. Using a one-tailed test with α = .05, what conclusion should be made?