neo effect on mental alertheks. A sample of n 16 participants is obtained, and e

Question

neo effect on mental alertheks. A sample of n 16 participants is obtained, and each phers dose of the medigation one hour before being tested in a driving simalation individuals in the sample had an average score of M 56.5 different aftertaking the medication? Use a two-tailed test with -,05 and the For the g with = 60 and -8 The a. Can the researcher conclude that scores on the driving simulation taSatep procedure are significantly 5-step used in class. Draw the distribution with 2 appropriate standard deviations aba mean above and below the s), z cut 196 a. 52 lude that lower after taking the medication? Use a one-tailed test with a-05 and the 5-step procedure we task are significantly used in class. Draw the distribution with 2 appropriate standard deviations above and below the mean. fo ai Dm 1.15

Explanation / Answer

Ans:

a)For significance level of 0.05,two tailed cut off or critical z value can be calculated as:

alpha=0.05

alpha/2=0.025

lower cutoff=normsinv(0.025)=-1.96

upper cut off=normsinv(1-0.025)=1.96

(see the z value corresponding to cumulative probability of 0.025 and 0.975 )

b)For significance level of 0.05,left tailed cut off or critical z value can be calculated as:

alpha=0.05

left tailed cut off=normsinv(0.05)=-1.645

(see the z value coressponding to cumulative probability of 0.05)

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