Question 1182430
this is a 2-way 2-sample t-test 
Ho: P=L
Ha: P NE L
alpha=0.01
test is a t (0.99,df=26), reject for |t| > 2.779
t=(diff means)/ sqrt ((s1^2/n1)+(s2^2/n2))
=-150/ sqrt ((250^2/16)+(300^2/12)); denominator is sqrt(11406.25)
=-150/106.8
=-1.40
insufficient evidence to reject Ho
p-value = 0.17