A Textile Company Is Interested in Knowing If There Is

A textile company is interested in knowing if there is a difference in the breaking strength of four different kinds of thread. Test whether there is a significant difference in mean breaking strength of the four kinds of thread. Calculate the test statistic.
F = ______________
Set up the rejection region for = 0.05.
The rejection region is ______________.
What conclusion can be drawn?
______________
______________ of the mean breaking strengths of the four kinds of threads is significantly different from the others.
Find the approximate p-value.
CI = ______________ Enter (n1, n2)
Find a 90% confidence interval for .
CI = ______________ Enter (n1, n2)