In 1908, W. S. Gosset published The Probable Error of a Mean (Biometrika, Vol. 6, pp. 1-25).
Question:
a. Identify the variable under consideration.
b. Identify the two populations.
c. Identify the paired-difference variable.
d. Are the numbers in the table paired differences? Why or why not?
e. At the 5% significance level, do the data provide sufficient evidence to conclude that laevohysocyamine hydrobromide is effective in increasing sleep?
f. Repeat part (e) at the 1% significance level.
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