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1a.  H0: A cookie will break at more than 70 pounds of force or greater; u >= 70

Ha: A cookie will break at less than 70 pounds of force on average; u < 70

1b.  yes

1c.   p = 0.0359  There’s a 3.59% chance of finding a sample mean of 69.1 if u >=70.

1d.  p = 0.0002  since p < 0.5, there is enough evidence to dismiss H0

1e.  p = 0.0227  since p < 0.5, there is enough evidence to dismiss H0

 

2a.  cor(mod8$Cost.per.serving, mod8$Fibber.per.serving)

2b.  .228

2c:  cor