A researcher would like to determine whether an over-the-counter cold medication has an effect on mental alertness. A sample of n = 16 participants is obtained, and each person is given a standard dose of the medication one hour before being tested in a driving simulation task. For the general population, scores on the simulation task are normally distributed with μ = 60 and σ = 8. The average score in the sample was M = 63. Can the researcher conclude that scores on the driving simulation task are significantly different after taking the medication? Use a two-tailed test with α = .05. Show your work. State the null & alternative hypotheses. _________________ Calculate the standard error ________ & test statistic (z) : ___________ What critical z value will you compare this with? _________ Make a decision on your hypotheses : _________________________________
A researcher would like to determine whether an over-the-counter cold medication has an effect on mental alertness. A sample of n = 16 participants is obtained, and each person is given a standard dose of the medication one hour before being tested in a driving simulation task. For the general population, scores on the simulation task are
Can the researcher conclude that scores on the driving simulation task are significantly different after taking the medication? Use a two-tailed test with α = .05. Show your work.
State the null & alternative hypotheses. _________________
Calculate the standard error ________ & test statistic (z) : ___________
What critical z value will you compare this with? _________
Make a decision on your hypotheses : _________________________________
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