Consider th e following m easures based on independently drawn samples from normally distributed populations:

S a m p l e 1: s 21 = 2 2 0 , a n d n 1 = 2 0 Sa m p le 2: s 22 = 196, a n d n2 = 15 P-399

a. C on str u c t a 95% interval e s t im a t e o f t h e ratio o f t h e population variances.

b. U sing t h e c o m p u t e d c o n f id e n c e interval, t e s t if t h e ratio o f t h e p o p u la tio n va r ia n c e s differs fr om o n e a t t h e 5%
significance level. Explain.