Question 1189882
this is a 2-sample t
Ho: mu drug<=mu placebo
Ha; mu D > mu P
alpha=0.025 p{reject Ho|Ho true}
test is a 2-sample t (0.025, df=14)=2.145
mean s1=4.429 s1=1.81
mean s2=2.0 s2=1.31
t=(s1-s2)/sqrt( (s1^2/n1+(s2^2/n2))
=2.429/sqrt(0.468+0.215)
=2.94
reject Ho and the drug raises the pulse rate more than the placebo, because t value in critical zone.
p-value=0.0069