Actually, the original joint strength study was a 3x3 factorial study with constant sample size m = 3 and Spooled = 8.0 1bs. Below is an interaction plot from the whole study. 250 Oak 200 Pine Strength (1b) 150 Fir 100 White Carpenter's Cascamite Glue9. The difference in pine and r average (across glues) sample means is 43.6 lb. Thus, by the standard of two-sided 95% condence limits, the difference in pine and r main effects (Hint: Lab 9 Q6) :1) is 43.6i3.7 lb b) is 43.6i4.6 1b c) is 43.6i6.5 1b d) is 43.6i7.9 1b 10. The sample mean strength for white glue joints on oak wood is 257.7 lb. The average (across glues) of oak sample mean strengths is 223.2 lb. The average (across woods) of white glue mean strengths is 160.5 lb. The average of all nine sample mean strengths is 176.7 lb. The tted interaction between oak wood and white glue (Hint: Module 44) a) is 16.2 b) is 46.5 c) is 50.7